Bet on yourself when nobody else will. You have inside information they don’t.

Nobody else has your information. They see your results so far, your age and a short summary; you know how hard you have actually worked, what you fixed last month, and how much of the last failure was circumstance. Their estimate runs on less data than yours, so treating their doubt as expert opinion is a mistake.

When you back yourself, do it with something specific rather than a mood. Name what you know that they do not. Then put a real amount of time, money or reputation behind it, because a belief you never act on stays a feeling.