Mot of the crypto dealer r user lost something or value during the red zone, some even lost more than the half depending on the quality of the coin they were holding, but what is done is done, there is no undoing. the best thing you can now do is t hold on to the coins you are having and give them time to regain their value.
No we need to learn from experience and not to fall to the same hole twice. However, you should learn from experience too and become better.
If you loss that much then you should think of options to move focus to other coins and sell your coins, no need to think about losses because all decisions are dynamic and recoverable. I have a similar experience and i cut loss and buy at deeper and try also other options.