Have you ever stopped to reflect that we don't appreciate it when we have something, but when we lose it, we soon value everything we had before, and that's natural, we only know the value of something when we lose it.
And life doesn't wait for you to decide or learn to value, it soon hits you and shows you that opportunities can't be wasted but taken at the right time.
All decisions in life have a cost, either you pay for being beaten in life, or you decide not to persist so much in the mistake. Mistakes and failures are inevitable, but persisting in the mistake is wanting to fail in life.