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.
Bitcoin can not replace fiat, but bitcoin can be used for investments that can give us an advantage, and if we want to spend it we can convert bitcoins into fiat currencies.
Right that bitcoin is being use as investment and it use to increase the income for the people but it is also true that now people use bitcoin more than fiat for shopping and for a lot of thing they were doing in past with money or fiat so now they prefer to do with bitcoin, I personally found bitcoin more reliable and convenient to use than fiat, bitcoin save my time and I can do everything with bitcoin without any problem, so the future of bitcoin is very bright I think in future we will see it legal.