Tough to know when to sell… as an investor for a long time, I usually think about investments as long term holds based on a conviction I have (if I am investing in individual companies), but I don’t think crypto can be a long term investment, with exception of BTC and maybe ETH - BTC as a digital gold store of value with a small place in an asset allocation, and ETH as the main place for blockchain use/development. Most everything will likely not have significant value in 5-10 years compared to now, in my opinion.