Currently, if you want to buy any altcoin, it is very difficult. You can't choose an option quite easily. Also, the crypto market is currently volatile. In such circumstances if one wants to buy altcoin. So what should be the main focus?
The main question for you is whether you want fast incomes and big risks or want to invest for the long term with lower risks.
If you are tolerant with risks you just should follow trends and news.
If you are a conservative investor, you should rely on fundamental analysis. Try to investigate docs, ideas, team members, partnerships, community and tokenomics, of course.