Exchange token is good to buy, while hold for a long time and among all exchange token been mentioned, I prefer investing on Kucoin and is good to buy and they are more reliable to invest in cryptocurrency market, while expecting big whale to come in the near future.
I have been holding BNB for quite a long and the returns that it has generated have been good. Apart from getting normal market returns I have been staking them and getting a decent APR. It also helps me to trade on Binance at reduced fees which is a good option for daily traders. As I am not a daily trader I only use that facility whenever I am making any purchase or selling. I do get a small amount of airdrop of new coins when they get listed on Binance. There are a lot of benefits that exchange tokens give.