If that happens i think we all lost our money, especially when the value becomes zero.  But it will never happen. People always says that bitcoin will crash but it never happened. Maybe some altcoins can crash especially those altcoins is new in the market especially those altcoins that has no puprose. The price of altcoin and bitcoin is volatile, that is why many people is keeping in mind that it will crash but the opposite is it will recover from its dumping.