In any given casino where winning is based on sole luck, the house edge is always against you, and guarantees that casino a profit turnover the more you keep gambling. Even though you may win at first, the house is betting on the fact that you'll get hooked on the win streak high, and that you'll keep playing, till that house edge materializes and you lose.

I think the best sort of gambling that isn't based on luck, or luck alone, is the best. Things like elections and sportsbetting where you are able to take the history of a candidate's or a player's history into account for your gambling decision, your appraisal of them also. In this, you do have a tangible chance that isn't just based on luck.