Some Altcoins can really make you a lot of money, you just need... luck!
Yes, luck, because many projects are starting really well, then they become a scam.
Just keep your eyes open and join some good airdrops.
Ya it is true that some altcoins in initial listing price goes very high but after that it comes down and that is the correct time to sell off, but only joining with airdrops wont give you profit as today airdrop reward is very low like a peanut. so if you join signature campaign or social bounty then the reward will be good and you will get good profit when it get listed.