My modest opinion. Cryptocurrencies are 1- very volotile and 2- not seen as longer term investments. This monumentous swing could be a result of a large percentage of investors skimming their profits, causing a sell off. I also know a few day traders that rely on these earning to support financial needs or desires. Christmas is just days away. Are these sell offs a result of record highs and a desire to turn that into consumer goods? My bet is that after the holiday when the discretionary funds are freed up again, we will see a strong buying pattern. Just a thought.