Yes, got you intrigued, didn't it?
Bitcoin is a very good thing to have as an asset. Just like gold. Even better if I may say. It's secure, and unlike fiat money it actually exists and work is put into it to produce it. This makes it great to store value.
However, it cannot and will not replace current fiat money that the entire world it using. It just cannot.
Take paying a cup of coffee for example. To pay your coffee with bitcoins, one must get bitcoins first, either by mining or buying bitcoins with other kinds of money (*cough*fiat*cough). It ends up being a quite complicated process, don't you think?
Until we reach the point where paying for a cup of coffee is as easy with Bitcoin as it is with cash, we will never get mass adoption. And as far as I see it, there is no way of simplifying the acquiring of bitcoins.
There are plenty of coffee shops that accepted bitcoin as far as I kno, even restaurants and Starbucks too.
I agree that bitcoin can't replace fiat due to a Nation won't allow it happen and people still bound with fiat.
For example, every increases of bitcoin, massive transaction convert bitcoin into fiat occurred like what just happened in the last few days. People still buy and sell bitcoin with fiat money right.