This is maybe the best answer for you, you can use this site https://cryptorank.io/ieo-platforms-roi and that site already made a calculation for how much ROI that already made by any launch pad in various exchange site. You can try to participate in binance and gate.io IEO. but for me gate.io is much better consider about the mechanism is so easy compared with binance that used lottery and you can participate if you have a lot of luck to win the lottery. use that chart to decide which platform that will be used to invest your money.