A lot of depends on potential of the coin and how useful it is.
Cryptocurrency is very volatile. It is good for trading.
But for long term investment coin must be useful.
It is necessary to evaluate the future potential of the coin.
Now there is a big demand in nature protection, that is why the project that protects the planet from pollution like this
https://twitter.com/liquidearth_nft/status/1502269439785541633 has a good potential for investment.
I dont think that now is a good time to sell. Now it is better to buy.
Bitcoin and Ethereum now overvalued that is why investors are looking for new and prospective projects for investment to invest money on their seed stage and have a maximum profit from investment.