In my opinion, some top coins in CoinMarketCap can still go up to new all-time highs because of their long term use cases and fundamentals. For instance, Bitcoin and Ethereum are likely the top ones for the long run because no matter if they go down, they would likely go back up stronger than before.
It’s all about making our own decisions, managing our risks, etc. However, there are old coins like Dogecoin, Shiba Inu, etc., that I don’t see as great long-term investments though. DYOR is still very important no matter which crypto that we want to invest.