In the case of betting, strategy cannot always bring positive results to the gambler, he must change the strategy. If you do not win with a strategy, you should not think that the strategy is not good. Sometimes a strategy may work and sometimes it may not be effective. That is why you have to rely on luck to some extent in the case of gambling. In the case of casino gambling, if I use a strategy, I try to use it several times and if I do not get any positive response there, I try to change that strategy. But generally I try to gamble based on my limitations so that if I lose, it cannot have a negative impact on my gambling.
Yeah, although I'm certain that no strategy works for long term. Some strategies help you win in the short term but if there was any strategy that was working in the long term, the casinos/sportsbooks would have shut down already. I am a sports bettor and I do change my strategy like sometimes I am betting on markets such as winner/set winner/goals, etc and sometimes I change my strategy and bet on more specific markets such as Player aces for tennis, anytime goal scorer in soccer and other similar markets in various sports.
I have to admit that betting on specific markets gives you a better chance of winning as compared to when betting on the big markets such as winner, totals and so on because millions of people bet on those markets.