maybe coins that are still cheap, I can say that Solana and ETH are still relatively cheap now and are very suitable for long-term holding and are also more promising than buying memecoins which are only temporary hype and not suitable for the long term. Many people become millionaires by buying memecoins, but there are also many who losing money there, buying memecoin is the same as gambling, you have to go in quickly if you want to buy it, if you are even a little late, you will lose your money, that's what I think, but remember, this is not financial advice, still do your own research.
Everyone should understand by now that investing in meme coins has more risk than potential rewards, as you said, it's just like gambling with your money because you don't know what the outcome might be. If the meme coin you have invested money in manages to gain traction and gets enough hype, you might hit the jackpot, but if it doesn't manage to do that, you will most likely lose your invested capital.
There are a lot of good and promising altcoins that are still very cheap apart from ETH and SOL because BNB, ETH, and SOL have already managed to go up pretty well when Bitcoin touched $73k, but some other altcoins are still in mid-range which means they can be good for the bull run.