OP, I think you are short sighted. Yes there are a lot of scam projects be even in the top 100 you can find scams. You have to do your research. Most trading volume on exchanges is fake so theoretically any crypto can be in the top 100 if they pay exchanges for market making. What you need to be doing if you want to make money in crypto is to find projects that haven't increased in value yet and invest in those, like CVP, 0xMR, WasabiX...
I think you just have to look at all altcoins as scams just earn BTC by trading them. It makes more sense that way than investing in altcoins obviously the team isn't serious about developing. I can't even think why they would name some projects like Aquadoge but I guess the success of ShinaInu had encouraged these developers to try it as well. The top 100 I believe is less possible to be a scam but its still not final to say.