While it is not very clear how cryptocurrency and cryptocurrency projects will develop over the course of 5-10 years, we all now understand only one thing, this is that all these projects are aimed only at receiving excess profits, which they would never have received if they had accepted investments not in cryptocurrency and in ordinary dollars.
My belief is the same as yours, I still believe that if we invest in crypto it will bring profits in the future. even though we can't predict about bitcoin in the future, but I'm still sure about the next 5 years crypto is still good for investment.
I hope so too, it will be seen, but still there are very few people in cryptocurrency and I am sure that when more people come, the growth of cryptocurrencies should be much higher, it is even statistically already counted, in principle 5 years you are right, this is the most optimistic forecast.