Bitcoin is no different than any other technology, because it still favors the rich. ^hmmmmmmm^
Actually yes and no.
If you are poor you will change Bitcoin into local currency and goods very fast because you need them.
Else you afford to keep the Bitcoin in the wallet long enough to get nice profit or even buy or trade.
It's not that much about rich and poor, it's about poor and not so poor (which is way different from rich).
And even less about tx fees. If you are poor you will optimize your transactions to not pay those fees.
It's just another asset. Yes, many poor people come thinking of Bitcoin as the seed for the tree with gold leaves. No, you have to work for it, you have to be smart about it, you have store or "buy low sell high", concept indeed, not for the poor. More for the middle class imho, since imho the rich should be busy managing their money, not investing in something so new, uncommon and highly volatile (ie risky).