$BTC $ETH $BNB : RISK control.
For you to ask what you should do, I bet you this trade may get worst than this if you didn't cut it and accept the loss as it is. Your mental health first.
As a trader, be it beginner or veteran, just as you have a target point for take profit, you should have a target point too to stop loss.
You should know when the trade you open will be wrong. You should knoo it in advance, Just before you open the trade.
Your new Margin will still be up to 50% of your initial margin, it is not that bad at the moment, remember Einstein in motion stays in motion: if itnis going bad, it may probably get worse.
Peace!