In 20 years, people will either be saying Remember when you could buy bitcoin for only 3500? or Remember when everyone lost their minds and spent millions on useless internet money?
One day cryptos might boom in such a way that basically everyone who didn't invest in them will become poor
We really cannot predict the future. Remember, the decentralized market always has a weakness that is without government control and the market will be difficult to achieve capitalization of hundreds of trillions of dollars. Anyway, let positive thoughts lead you.