It's not really that I'm trying to "cash out", because I'm keeping almost half of the Smash line I purchased: characters I like or that are otherwise meaningful to me.
With the Smash line I was more or less on autopilot and buying them as they were released for some reason. Now I've sort of "come to my senses" and realized I don't particularly care for Pokémon, Fire Emblem, and a few other franchises I bought amiibo for.
I love the Mario characters, but I'd rather have the Mario series amiibo than the Smash series, so I'm selling Luigi, Peach, Yoshi, etc.
Kirby's Adventure is my favorite NES game of all time, so the Kirby characters mean a lot to me, but I'd rather have the Kirby series amiibo than the Smash series amiibo, so I'm selling the Smash series Kirby, Dedede, and Meta Knight and I'll pick up those three in the Kirby series down the road.