I wouldn't vote for Bernie Sanders if he wasn't a candidate. But I don't think it's a wasted vote. At least you vote for something you believe in. My understanding of the situation in USA is that many people don't vote because, they don't want to waste their vote, and they don't want to vote for the 2 main parties so they end up not voting instead.
As every people own themselves, it is immoral to demand taxes. Therefore, we should remove the government and let corporations rule everything instead.