beware of a false dichotomy in regards to 'success'.

It's far more likely that bitcoin settles into one or more specialist/niche roles as a currency, and serves them well. So no, you may never be paid wages in BTC. And you cant eat BTC. But you will be able to do a whole lot of other useful stuff with them; stuff that is done better with bitcoins than dollars.

I'll leave it as an exercise for the readers to work out that that stuff is