In your life, it doesn't matter what's getting taken away from you. The thing that gives you real confidence,is who you are at your core; and what you bring to the table in every situation, by who you are.
Confidence is not what you have, not what you've achieved, not who you know and not where you've traveled.
Don't base your confidence on how many things you're achieving and how that makes you feel
Base your confidence on:
What things can you lose? What opportunities can go wrong? What risks can you take even if it won't pay off?
And when you lose all that stuff - Are you still gonna feel amazing? Cause THAT'S core confidence