Why do I buy things just for it to become cheaper just a day or so later?

Why do i buy games just for it to become cheaper just a day or so later? What is my luck! Like…i bought a game, thought it wouldn’t become cheaper anytime soon and 2 days later, it went down way cheaper! WHAT IS MY LUCK! My luck is so bad! I didn’t even play the game.
Updates
3 mo
Like i bought metal gear solid Tactical edition ps5 on amazon for $37.60 and i got it yesterday! BUT! Apparently it’s $29.99 now!! Cheaper than the digital version and I spent just as much as the digital version prior! WHY DOES THIS HAPPEN TO ME?
Why do I buy things just for it to become cheaper just a day or so later?
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