$2,000,000 is a lot for me, but for some people or funds, that is nothing and worth taking a long shot on. a lot of very rich people know what bitcoin is.
Many of these transactions are happening within seconds of each other. This is on automatic pilot. Pick any one transaction at random and following it for awhile. Look at the times. Look at some transactions split then return to the original total and increases it. My head is spinning. (tired)
~Bruno~
then could it be a way to launder coins?
Laundering them, then storing them all in one wallet? There's several other large accounts that siphon coins to this larger account. Like I've suggested, take any address and follow it. You'll be amazed.