Sorry, but I think the US isn't ready for someone as "left" as Bernie right now. Getting Bernie in NOW is probably a recipe for a disaster AKA losing the presidency.
I think after Hillary, then it's time for someone with as much moxie and enthusiasm as Bernie, but right now there's still too many people that aren't ready to lean that far left.
Losing the presidency is the biggest reason why I don't want Bernie to win at this given time. I mean, I don't want SCOTUS to be filled again with another Scalia, and I want the baby steps to continue towards fufilling a few of Obama's ambitions which he's left with Hillary.
However, if the first term of presidency, the "fears" are real and Hilary apparently acts like a Republican or something, then everyone will react and probably vote against her. I'd rather give her a chance first.