Bought, bit by bit across a period of 60 seconds or so, which is puzzling.

The way the wall would be constantly brought down to kiss the best bid screams 'big scary wall of doom' manipulation attempt. At the same time as buys started coming in the seller had plenty of time to cancel the offer and keep his coins which suggests this may have been a genuine attempt to sell his coins. The other theory is the wall was self-bought bit by bit which is also silly because if this really were the bottom there'd be buyers one way or another, what's 7k coins worth at $126 when we were at $134 few hours ago.

But hey, let's hope the coins were an early adopters who wished to cash out and they're now distributed across multiple buyers.