I've invested 20k and now I am left with 5k, that means I need my portfolio goes 300% to recover the capital invested... but 300% is not an absurd number for crypto market.
In your case you need your portfolio to go more than 1000%, rather tough. I think bitcoin price going to 40k usd should be your hope.
That may be a risk that must be accepted when investing when prices are high, because to get advantage must increase even higher. It turns out that prices actually go down and losses must be received.
Therefore there is no other way unless the investment is maintained and expects prices to rise as high as possible to return losses that have already been experienced. Or, wait for the lowest possible price and as much investment as possible, then pray the price rises.