The good news is that now we have 2 block explorers and we can confirm: https://digiexplorer.info/address/DCo1dbnnwWB4cucwSduXMdTV1tDErZHNfx
That looks like one "whale" of an investor. It looks to me like it was all purchased on the open market, and not exactly at the lows. I'm doing a fairly close analysis, but you can get a general idea by matching time stamps to the historical price chart. A major investor who has made a huge investment and had no problem riding out the storm when price dropped. I would say that this is someone who plans to hold for a long, long time.
Bigger than the next 9 of the top 10 all put together, but they're no slouches either. Fun to look at. For example, #2 looks like an early miner who later did some buying, #3 looks like a pure investor who was last buying at lows last fall, hung on during the dip to 17 SAT, and has recently taken profits (the rich list is not updated to reflect the most recent sells though . . .), #4 bought his/her entire position between 51-55 SAT between June 30 and July 1 last year and had no problem riding out the slump, etc., etc. These DigiBytes are in strong hands.
Not sure if it was the same person but during the pump last year I saw someone put down 400 million at 100 sat. Removed it after a bit as they were trying to force the price down.
There is some major players on Poloniex.
Perhaps, but by the pattern of buys, I'm not too sure he/she cares too much about a few more or a few less (+-100) SAT. Looks like a very long term accumulation when things are looking good (i.e. not much done in the absolute low ranges).
Looks like wallet #5 is a major exchange, probably Poloniex.
Edit: BTW, 66 SAT is the full halfway back (50% retrace).