It’s possible.

We have example of Luna. It went down 99% of its liquidation and went almost zero in terms of pricing. So there is no way one can guarantee that crypto will be firm at its position above 80% or so. As you have stated your projects went down to 80% window then obviously they can loose value even further and become zero.

The only way to secure your funds is to convert them to stable coin. However that also has timeline which we have already lost. I mean you can save up 20% loss but not more than that at this point. It’s better to wait for the crypto to go bullish and then think about next strategy.