Part of it was for the lulz sure, but another part was arbitrage with BTC China:

- China had gotten ahead because ppl there were betting that the stamp wall would fall resulting in a rally.
- Erect supporting bid walls everywhere
- Buy at a fixed price from the wall and feed china 7% higher.
- When the wall fell, china got its final spurt, which was duly capped with a market order.
- If net position was still +coins, the rest were dumped in stamp, capping that rally also.

Another day in bitcoinland. Now things are quiet again