I think OP was trying to reply to a thread, and accidentally created a new thread. In that case, OP, please lock the thread by clicking the "lock thread" button in the bottom left corner.
If not, I think that the "safe" methods to gamble are to bet on sports, and to play poker, as these are games based on skill more than luck. However, do note that these methods are not 100% safe.
Yeah Playing a skill based games do have a lot contribution in reducing losses in compared to playing a luck based games like dice.
Another thing in skill based game you are the one who set yourown strategies in the game, not like in dice wherein you can't control anything in the game rather than changing the bet or the money at stake only.