Considering that the market has a ton of shit coins its best to stay away from them and just only way I see any profit making business is by investing in gambling sites bankroll.
Trading is tricky so yes, not everyone can get success into that and only the ones with knowledge and experience can get their hands wet there, and casino bankrolls can also turn wrong in some cases, i heard someone saying he lost some money by investing in a bankroll because the casino went into -ve in that period of time maybe, i don't know.