Open CMC top 200 and do a good research, and choose anyone, a lot of coins are good, near, solana, dot, siacoin, eth, matic and a more and more. Just choose 20-30 coins and invest in them, dont hold all money in one altcoin. Its one of powerful rule.
You really serious, top 200 coins on CMC. In my opinion, you only need the top 10 coins for you to research and hold. you will be confused and lose your judgment when you research too much with 200 coins.
It is correct to divide eggs into many baskets in investing, but it is not necessary to divide up to 20, 30 baskets. it will make your portfolio look like garbage and it will be difficult to manage. Just do your research on top 10 CMC and hold 3-5 coins you think are best, maybe even safer you should just invest and btc and eth.