You registered in this forum in 2018 so I would assume that you have been learning about crypto since then or maybe even earlier. When did you realize this? This is something we all should know by now. Only a beginner would not know to buy during bearish cycle and take profit during the bullish one.
The Cryptovator knows this few years ago. He has posted something similar to this before on beginners and help board in 2020 or 2021 when the price of many altcoins were so disappointing before the altseason started. I think he is also just disappointed with how solana turned out to be lately which he see as an advise to people. People should always know how volatile altcoins are and they should be taken as gambling.