Its better to invest in bitcoin than into fiat money because the price of bitcoin is not stable and it may high or low. So that if your investment is successful you can keep it until the price of bitcoin go up and then you can change it into fiat money.
So you can expect a lot of years and did not wait for an upward price movement. There is an option even worse when the price can fall. I think it is very risky to keep all the money in Bitcoin. Only a certain amount. Fiat money is a long time will remain the most popular.
and as many people believe
This is only a hope.