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.
I always think about the future of Bitcoin's price because I've invested a significant portion of my money in Bitcoin. I always try to predict what might be the lowest price of Bitcoin if there is a big crash and my prediction has always been successful. I think that Bitcoin doesn't lose more than 85% of its all-time high and I also believe that Bitcoin will always reach and surpass its all-time high.
There are some reasons that can fall Bitcoin but I can't think of anything that will destroy it. Bitcoin is decentralized, it's mined and owned by millions of people around the world. If there is anything that hurts Bitcoin the most, this is if countries like the USA ban it but even if they ban it, Bitcoin won't disappear, it will fall down but it will stand up and rise.