IMF is already considering crypto as a new form of currency. With the current technology the world have, they are already aware that BTC will be useful.
But, I think this will take years to be used in full. Crypto is still in development stage.
I agree with you mate. Cryptocurrencies particularly bitcoin can be so useful at the moment but specifically for investment still. Volatility is the main hindrance why many of us still cannot adopt or considered cryptocurrency as our main currency. Development stage is on going though so hopefully in coming years it will become more stable to be use as mode of payments.