It's really hard to take someone seriously when they say the price is going to literally go to zero. It's possible to imagine crashes of 90% or even much worse for an asset like Bitcoin, but a market price of zero would suggest not a single person in the world is willing to pay anything at all for a Bitcoin. Absent a world-changing event like hashing being completely broken, the price will never be exactly zero. I can guarantee this since I myself would be willing to pay at least 1 cent for every BTC that exists, and I know that many would be eager to outbid me with that offer.
If someone is so good at calling the exact extent of this crash, then they should place a short on Bitcoin. You don't have an excuse anymore. It's on regulated markets, unrelated markets, and everything in between. If you really think it's going to zero then put all of your money in a short and make sure not to close it until it gets there. Options are also available for some investors, which should be even more lucrative for you.