It practically won't. We saw the gigantic crash of Luna after people proved that it's technically flawed. It was not that old and really didn't have as much market penetration as bitcoin and still, it fell almost 99% but didn't go to zero. It's price bounced back quickly and then you saw it floating around in the market. At worse the same thing could happen with bitcoin people someday realize that whole cryptography is technically flawed and it makes no sense in keeping your money in bitcoin and people start instant withdrawing. Even in this scenario there will be certain sect which will disagree with that theory and will keep on investing in bitcoin so those people will keep the price alive.