It is fine not to sell anything if you believe strongly in the long-term future of crypto. Trading can of course be immensely profitable, but it can be very stressful as well, and does provoke a tendency to be constantly checking for price movements. I know some people say those who just hold long-term are missing out on big profits, but they are also missing out on stress and the possibility of big losses by selling at the wrong time.

Personally I think long-term holding of solid coins - particularly bitcoin - is a perfectly good strategy.

I tried to cover both approaches, I sold some and held some. The stuff I held I bought back lower and increased my holdings. But not as much as I would have if I'd sold everything. The trade-off was reduced stress and reduced risk, and I'm happy with that.