The problem is that even bitcoin users believe more in fiat than btc.
If they thought btc was the bomb, you will see more customers requesting that street stores add bitcoin payment options.
Actually, there is only a small percentage of bitcoin users believe in FIAT. Most of the people here believe in the bitcoin faith to be the international currency. But sadly, in some area, there are laws and restriction which avoid them using Bitcoin as a currency. Thus, they have no choice but to sell bitcoin into Fiat in order to buy daily needs. It is hard to keep bitcoin without spending it somewhere either online or in the real life