I hope this will never happen of course, but for who have invested capitals, it may be a question someone have answered accurately to avoid an important loss.
Bitcoin price movements are no secret, so it's easy to look at the charts and see for yourself. Bitcoin drops in value dramatically regularly (although that also depends on what you consider a dramatic drop). Sometimes it can recover quite fast, but if it's the bear market coming, it might take several years (around 3 years, to be more exact) for Bitcoin to fully recover. That's just how it works, which is why patience is key with Bitcoin. If you're not okay with your investment being 60% down for a couple of years, Bitcoin just might not be for you.
60% down is much, that’s way more to chase a scare for real. That is, given the consideration of where you bought Bitcoin and not exactly where it pumped to and later dropped. When it dumps 60% that’s below average and just 40% from complete liquidation and I’m guessing that could never happen or would never happen.
The Big investors having huge stake in Bitcoin would never let this continue, they would buy more as a way of getting other traders to see it for a buying opportunity which it is eventually and would buy to get price pumping once more.