Did you bought bitcoin higher than $19,000? Seems that you are very positive that bitcoin will went higher than $20,000, dude it's fine cutting your loss.
Honestly I rarely read about some people who bought bitcoin when it reached new ATH for hodling investment.

For me it's a bad idea given that bitcoin could go down again.
You can sell it if you want your loss to cut, buy it again on much lower price then sell it when you're comfortable with your profit.
It's not late, you can still learn and have a better decision.