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.
you need fiat currency if you are going to do any purchases locally so fiat is important in that aspect ,more business has to adapt to the new technology and the amount of people using bitcoin will be around in few millions in a billion population. So there are obstacles and hopefully it will be cleared in the future .