Basically I am exchange token supporter. Just see how works BNB or QASH ( stable price from end of August!!! )
If look to another projects - you have check out Github and community activity. I mean offline activity first. Meetups, conferences, AMA with founders...
I think it's better to invest in coins that are in the top position in the market because it's safer. especially in conditions now investing in new coins is very risky. and ETH is a coin that I think is very good to buy now because the price is down but the potential to rise is very large because ET is a coin that has a large community.