Unfortunately there will be no evidence that you really tried your best if you don't make it. The sleepless nights. The losses. The doubts. All will mean nothing if you don't win. That's why you have to make it. Success is your only option
Major cheat code for life: Make peace with being unimpressive to the outside world. Drive the normal car. Wear the simple clothes. Live below your means. Stay in the committed relationship. The ability to look ordinary while building an extraordinary life is wildly underrated.