The wallets list is more informative for information about our mystery whale. It appears that a few weeks ago they withdrew ~8,000 UNO, something like 30% of the total Bittrex UNO. So they're withdrawing some of what they're accumulating, at least for now, they could of course deposit it all within minutes. Our data is a little more limited since Bittrex removed their distribution tab, but in my opinion it's a safe conclusion that the person who is regularly buying up the ask side on Bittrex is also the one who withdrew thousands of UNO recently (& the one who had 10,000+ UNO visible on Bittrex when they still had their distribution tab).