My biggest losers are mainly down 10-15%. But from peak to w...

My biggest losers are mainly down 10-15%. But from peak to where I am now the losses are like 30-60% in a lot of them. What happened is stuff like PLTR $Palantir(PLTR.US)$ . I bought it in May for $19.50. It went up to I think the high over last few months was $29. I didnt sell and now it tanked to below my buying price.

DIS $Disney(DIS.US)$ , and ABNB $Airbnb(ABNB.US)$ are similar situations. Should have sold but decided im a long term investor and it cost me a lot of gains.