Using Binance is the best right now in my opinion because they are not obliged to do KYC and with low fees they are able to trade. And also there are several altcoins available which in my opinion are quite complete
I agree with you that Binance is the favorite market of all investors lots of good altcoins there why good, because the altcoins that can be listed on Binance are established coins so it's not wrong to choose one of the altcoins in Binance as an investment
Although I also will do agree with you Binance is a good option to pick a token for long term investment but there are still some hidden gems those are doing great job but moving under the radar. It need to be discover before it get listed on big exchanges like Binance. So it could give more better chance to make more big profit.