People who are not greedy and who wants to make money in slow and steady way will always choose trading over gambling as with good knowledge and skills you can surely make some money in trading.
The best thing to say about making money with bitcoin is to be patient and not to fall for the greed, because most of the people who start off in the bitcoin always find difficulties earning a considerable amount and they rush toward finding faster ways to make money, so they either lose their money in gambling or they get scammed in the process, so as long as you are patient and not greedy you will be able to find legit ways that give you a good profit over time.