As the value of bitcoin went down from $17,549.67 in dec 2017 to near about $4300 in dec 2018, I think that this is the downfall of the bitcoin and the cryptocurrency market. The difference is $13,200 in less than a year which clearly indicates that major cryptocurrencies are crashing in a sudden and dramatic manner as a result of market collapse, with ethereum, litecoin, and bitcoin cash all following its lead.