So, I've seen a lot of requests as to ways to make gold in this game. The truth is doing just about anything that doesn't cost you gold makes you gold- and doing what is the most fun for you is the right way to play, regardless of how "efficient" a manner of income it is. Still, if you want to save up for something, some concrete sources of coin are nice to have!
Some of these are more-or-less conversions between one currency type and another. Where applicable I put the kind of conversion it is in parentheses after the description.
1. Dungeons. Any dungeon path, Story or Explorable, is a great source of gold. In fact, Dungeons are an excellent source of nearly everything useful in the game except for loot drops. Gold, XP, karma, and tokens which can be redeemed for gear (which can become ectos for more cash, see b. below). You get silver as drops from bosses, a small handful from the internal events of a dungeon, and a chunk for completing the path. If you've never tried them, see about getting a guild group together. Some of them are very easy, fast and lucrative, especially if you...
1a. Use Raspberry Peach bars. These tastycakes will get you extra MF and gold drops for a fraction of the price of the Omnomberry Bar equivalent. Buy a bunch off the TP and use them any time you're in a "drop-heavy" situation, like a dungeon or Fractals or even Orr events, and they'll pay for themselves.
1b. Buy and salvage level 80 dungeon rares and exotics, and sell the ectos. Though they're soulbound, Exotics from any dungeon, and Rares from all but the first two, can be salvaged for Ectos. If you don't need the gear and just want the cash, here's your answer. (Dungeon Tokens -> Gold)
2. Farm and sell T1 mats. People always need T1 mats for starting out their crafting professions. Grab the cheapest Harvesting Tools and Salvage Kit or two and start running around one of the 1-15 zones harvesting everything in sight. salvage every salveable drop you get. At the end of your session, sell everything that sells for higher than vendor price on the TP (list for a little bit under the lowest seller to maximize your profit). Vendor everything else. This isn't the most efficient method, but it's easy, stress-free and it does work. If you happen to be in a newbie zone anyway- say, doing one of the World Events, give it a shot.
3. Save on your Exotic Armor and Weapons. Okay, this isn't so much a way to make money as a way to not unnecessarily spend money, especially on your first character. When gearing up, consider level 75-79 exotic pieces (or 80 rares) rather than level 80 exotics to get your ideal armor set. The stat difference is truly marginal, but they may be selling for 1/4th the price or even less. Depending on the skin you want, you may be able to employ a Basic Transmutation Stone rather than a Fine, too. Note: this tip does not apply to people who absolutely must have best-in-slot gear to enjoy themselves.
4. Sell or salvage Rares and Exotics. Once a day, you can participate in a number of
World Events that give you a guaranteed level 74 rare or better. Fractals are also a decent source of rare loot drops, especially if you use a bit of Magic Find (though be careful in the higher levels!) If you need quick gold, you can always simply sell these outright. Be sure to list a little under the lowest seller and above the highest buyer. If you need the ectos or have an extra Black Lion Kit from a daily or otherwise, salvage all of these rares for ectos- you're near guaranteed to get more ectos out than rares you put in, and an ecto sells in the same ballpark price as a single rare, or better. Note: this doesn't work for lower level rares.
5. Farm the events in Orr, Southsun Cove and Frostgorge Sound. Just spending an hour running around Orr can net you 1g+. Rather than trying to repeat a single event over and over again, run around doing every event you come across, killing every mob and harvesting every node. Hop on board if you see one of the Temple events (or Jormag if you're in Frostgorge) being taken, then get right back to the mobbin'. This is a great use case for some Magic Find and a Raspberry Peach bar, too. As in the less-stressful equivalent method 3, when you're done, sell everything- T5 and 6 mats, loot on the TP if it's over vendor price, and merchant otherwise, and you can sell Large Moldy Bags (1s) and Heavy Moldy Bags (3s) without opening them for a reliable chunk of cash.
6. Convert cores to lodestones and sell them. You can get certain cores from dungeons, world events, and Fractals. Two cores of any kind can be converted to a lodestone in the Mystic Forge and sold for profit. You'll need to buy a Crystal (1 skill point for 5) and a bottle of Elonian Wine (25s60c) from Miyani, and a Pile of Crystalline Dust for the recipe. As long as the profit from selling the lodestone would get you more than 20s+the price of the dust, it's worth it. Check
www.gw2spidy.com or the TP to see which lodestones are the most profitable.
(weak Skill Points -> Gold)
7. Forge and sell Mystic Weapons. After you hit 80, you're likely to start accumulating a pile of Skill Points and Mystic Coins without realizing it. Buy an Eldritch Scroll from Miyani (50s), and check the TP or
www.gwspidy.com to see which weapons are selling for the most (highest minimum buy offer). Craft or buy 5 of the relevant weapon part, and combine with 50 skill points, 30 mystic coins, and the Scroll in the Mystic Forge to get a Mystic Weapon- an 80 Exotic with a very cool skin. These aren't bound, so turn around and sell it right back onto the TP for a really solid chunk of gold. Note: you can buy Mystic Coins on the TP as well- believe it or not, as long as you have the Skill Points for it, this remains profitable.
(Skill Points/Mystic Coins -> Gold)
6a. and 7a. Because you can
get skill points with Fractal Relics, you can do a convoluted conversion for the above two as well if you play lots of fractals.
(Fractal Relics -> Skill Points -> Gold)
7b. Once you have the initial funds/ectos and skill points for it, the ultimate iteration of this is to
craft and sell The Anomaly for a big chunk of cash.
8. Play the TP. Buy low, sell high, etc. Put all those economics classes to good use. The TP functions like a pretty typical supply-driven market. This definitely requires capital to get into in a profitable way, but if you've got it,
www.gw2profit.com will supply you with all the information you could possible hope for if this is your thing. It all seems pretty overwhelming, but it just takes a little to get used to. You want to look for items with a bit of "give" between the highest buy orders and lowest sell orders. At the time of this writing, Butter is a good example- Put in a buy order for 250 at 45c. By the next day, it should be filled in full- then you can relist it at 50c. Minus the listing fee, that's 12s profit for essentially doing nothing. Minis, for another example, are extremely volatile and useful for this kind of flipping. Obviously it takes attention and dedication to make substantial money this way, but it's easy if you have the patience for it. You can also engage in the risky process of speculating, by following the official annoucements, dev comments, and in-game trends to predict spikes in certain items and buying them before it peaks. Your task then is to decide when to sell before the bubble collapses.
9. Buy dyes or T6 mats with Laurels and sell them. Pretty simple- the Laurel vendor sells some valuable stuff that is not Soulbound. Thus you can, if you must, convert Laurels pretty directly into gold. T6 mats tend to be the best value but there is an element of RNG as to which you get, of course.
(Laurels -> Gold)
10. Craft Exotic Jewelry and sell it on the TP. Despite conventional wisdom indicating that the Jewelcrafting profession is "useless" because of ascended gear, someone out there is paying cold hard cash for exotic rings, amulets, and accessories on the TP. If you farm your own Orichalcum and Gemstones, so much the better- but even if you have to buy them, there's still profit to be made here if you have the capital to invest. Again, be sure to check the TP or gw2spidy.com for what pieces are selling for the highest at the time.
11. Get a Gilded Infusion. If you already have an Ascended amulet with a utility slot and don't run fractals often but DO run dungeons, consider the 20% gold from monsters afforded by the Gilded Infusion. You won't get your cash infusion directly or all at once as in method 10, but unlike method 10 it will eventually (over the course of months of play) pay for itself and be pure and free money forever after. If you don't run fractals OR dungeons but do farm and do lots of events, consider the Magical Infusion instead to boost your chances for random rares and exotics to sell or salvage.
(Laurels -> Gold)
12. Buy Lost Orrian Jewelry Boxes with Karma. Literally any Karma vendor in Orr sells these. RNG aside, if you sell everything you get, you'll wind up in the ballpark of 3.6 silver per 1000 karma. This might strike you as inefficient, but it beats the crap out of buying karma exotics and salvaging them, and if you're not doing anything with the Karma anyway...
(Karma -> Gold)
. Not relying on any one single method of acquiring money will keep the funds flowing without making the game stale in the process. And finally, this list is by no means exhaustive. These are just some ways that I've noted and utilized myself to make money. If you've found something that works, add it to your own list!