I wanna believe in your prediction, but I'm afraid, that bitcoin can die in 2-3 years

Bitcoin won't be dead in 2-3 years or anytime after that. What I do believe is that the dominance of Bitcoin will wattle down a lot and other cryptos may catch up with it. But you are entitled to your opinion and what you want to hold on to. I guess believing that the death of bitcoin will be soon, you already are saving for the raining days to cash out.