for now, we are investing more in coins that have clear prospects for long-term investments, such as BTC and ETH while low-quality coins are too risky to be used as long-term investments.
Yes, because it would be too dangerous if someone put their money in coins of low quality, because now is a very good moment to put money in Bitcoin and ETH who are experiencing pump prices in the market.
Bitcoin and Ethereum are coins for holding, long term holding, but with some coins it's good to apply this "sell off" strategy, to sell them before they drop too hard. Basically all comes down to your faith in the coin you plan to hodl, if you don't have faith in that coin sell it as soon as possible, if you have faith keep it and add more if price drops. And don't let anyone tells you in what you should believe, that should be your own choice!