Well, nothing. I mean, people who despise bitcoin, usually don't understand how bitcoin works. And it doesn't matter if yo explain it to them or not, they'll remain close minded. Them hating bitcoin is actually not your problem.
As far as I'm concern, by it's nature, bitcoin is legal. However, certain organizations like banks or government may ban it if they feel it'll do bad than good. But that doesn't mean that it is illegal.
Considering the fact that bitcoin value rise and fall, and those empires that dominates bitcoin mining, as an individual who wants to get most out of it considering a very limited resource, what do you think is there that we can do to win?