I am as bullish as they come with bitcoin but lets be honest with ourselves here ....
Yes, there are plenty of people who are "all in", with no bank account. I'm one of them, and despite the previous comment, it's worked out well.
I can see it working well if you live in a country with hyperinflation like Venezuela but than again bitcoin isn't exactly too useful there anyways because lack of merchants for such region. Are there any countries yet that have fiat which are more volatile than bitcoin that have decent merchant acceptance yet?
Would be nice to pay my bills with bitcoin though...
How do you pay your bills if you went all in? Perhaps your definition of "all in" is different than mine?
Additionally, wouldn't you benefit financially by leveraging both local fiat and bitcoin to insure that you always getting a discount when purchasing goods and services with bitcoin. I keep track of the price of bitcoin when received or purchased and than will only use it when it is higher than my initial investment and when the market price is lower will use my fiat thus insuring another benefit(amongst many ) with bitcoin.