First of all, if what I have tried in cryptocurrency is worthless, that is a risk, cryptocurrency is very volatile, right? so by understanding that I have to be prepared for even the worst situation.

On the other hand, I am very optimistic that cryptocurrency will make a big difference to the world, especially in financial technology. This is a big evolution, one day there will be greater adoption of bitcoin. I think so because of some good news lately from Germany, India, and South Korea related to the legality of cryptocurrency.
A cryptocurrency can be worthless if its utility cannot attract the market, otherwise, if its utility is needed and widely adopted it will become increasingly valuable.