Maybe everyone has different suggestions and a much different strategy but I prefer to analyze coins that you will hold for a long time. you have to know the benefits of these coins and the team that is there. If you already know it is your choice to believe in the coin. I prefer to know about the active coinage with developments that always come from the ideas of the team. If the team still has ideas and is active in providing information to the investors who have participated in it, it is much better than other coins.
I personally do the same, but mine is much simpler and much easier study. I own the three top coins, btc, eth and bnb as my biggest investment, sure I have some small change in here and there, 80 bucks there 50 bucks here some changes but the reality is that I do not really care about those ones, I only care about the big three.
It means my study and research is not that big, I have been in the crypto world for many years now, before most people came in (and idiot enough to not buy bitcoin at 100-150 dollar levels) that is why I already know that buying bitcoin, ethereum and bnb is not that difficult choice it is definitely easy choice to make for me to buy the same top three things. Maybe one day I will be invested in bigger things, like gold and real estate if I ever own that much money, but I do not see myself buying something like that anytime soon.