Be honest, how would you feel if your friends investment shot up 1500x within months and you missed out?

So anyway I see a lot of people on here saying they're telling their friends and family to sell their cryptos because of the no product, or it being brand new aspect.

So I was just wondering if you were in the situation of never investing in the crypto they invested in, then finding out this whole entire time it has been rocketing to the moon and he didn't say a word about it? I actually seen this happen to this youtuber, he missed out and he had millions, if he threw a few grand he would've made a lot