Yes, your thinking and suggesting is very good. This is right way for buying some coin but i think have many another way for chooses best coin. First you follow her road map and see team Activity. If you saw coin team is active for this coin and market volume is high. You can buy this coin.
Yes, but the problem is that we cannot detect actual team activity in crypto, so that sometimes it can become a trap for everyone, because many teams are active at the beginning of the project but after that they deceive many people here.