Bitcoin will benefit rich people more for sure. Simply because they can afford the risk and the opportunity, they can dump a million into BTC and see massive returns in no time. That doesn't mean it can benefit poor people as well. If you can manager to scrap up even .5 BTC, in 5 years there's no telling how much that small amount could be multiplied. Just because others have an advantage over you it doesn't mean you can't also win. You just have to accept the fact that you may win less and be ok with it, otherwise your greed may drive you to make bad decisions.