I do believe that crypto currency is going to replace the dollar, fiat currency is actually worthless when you think about it, it's just paper and like you said it's backed up by no commodity whatsoever just printed at will by the government to meet the needs.

The banking system just serves to make the rich richer and keep the rest of us in check. Crypto currency is our chance to break free and generate our own currency without being tied down to the founding system.

I don't think it will happen overnight and I'm personally looking at a timescale of the 10 to 15 year before crypto really takes over but it will take over.

The other swing side to this is that these major banking families are not going to give up their legacy and how long will it be before they find a way to keep us down through crypto as well?