We all know that market is collapsed and reviving again and i don't want to miss this opportunity which coin or coins should i buy?
Just buy the coin or altcoin you have done researching. Did you finish researching a coin or altcoin? Then you can choose what coin or altcoin you are going to buy but if you are looking for a suggestion or recommendation on what to buy then I suggest buying bitcoin, ethereum and bnb. Bitcoin can be hold for long term or short term depends on how long you want to hold and willingness to risk when holding Bitcoin or other alt/coins.
If you don't know about research, I definitely buy the coin, and bitcoin, Ethereum, Binance might be the right choice, it can be long term and you don't need to pay attention to research, this coin has great potential in the future, if you don't want to bother with the research.
Other people who choose altcoins, of course, already know the technicalities they have and how to look at graphs and other needs to analyze the altcoins, maybe you and I can do it but other people who don't know anything then ask for advice on which coins to buy for me It's also hard to give advice.