yes for people who have a lot of altcoins in their portfolio and still stick around hoping the market will go higher and will give them bigger profits then the market will eventually go down, of course they will regret it. I saw how the market was going to ATH and the most surprising thing was BTC, and I sold some before it hit ATH and some when the market started to drop. but I don't regret it, because I still make a profit. The key is not to give up everything when the market suddenly pumps, because we never know what ATH will look like.