With all those bit coin days destroyed one could theorize a huge purchase of XXX,XXX coins occurred by fortress or something which averted an entire bear market worth of coins on exchanges.
Didn't that huge spike coincide with 400k oldish coins moving from a single address? What makes you think a single holder would dump 400k coins on exchanges? Maybe I am misinterpreting.
I don't remember 400k except some transfer someone pointed out from 2011 to scare people. What we deduced was based on the days destroyed, it would have to be at least 96,000 coins.
Whatever the amount is, it could be some ASIC mining firm that wanted to cash out their investment or pay invoices on equipment parts. Who knows.