MtGox died 3 months ago. If Willy was the only reason for the run from 10 to 1000, we should now be closer to 10. However, we are much closer to 1000 now.
And don't forget, during the latest rally, most smart people escaped MtGox and were trading on other markets. BitPay stopped using MtGox since June. Volume in MtGox had moved to Bitstamp and Chinese markets. These other markets are real markets where people could freely deposit and withdraw both bitcoin and fiat. Especially in Chinese markets, fiat withdraw and deposit was completely friction-less before the PBoC ban. High price at these markets could not be sustained without real liquidity.
The Willy report is an excellent forensic analysis. However, I don't agree with its conclusion that Willy was the single most important factor in the previous rallies. Undoubtedly Willy had "contribution", but it was only one of the many reasons.
In what might have been Willy's last dance, there was a 10K BTC whale who came to Bitstamp and erected a 10K Ask wall, sometime back in Feb 2014, just before the crash to $400 and Gox's closure. The 10K wall understandable freaked a few traders out and a sell of began on Stamp. Traders and bots on other exchanges soon followed suit, as did Gox plummet to around $100, which in turn triggered other exchange bots to correlate their trading with Gox. The 10K BTC whale, then moved his 10K wall down from around $600, to $580. Bitstamp was trading around $560 at this point. But then Gox started rallying. All the other exchanges started rallying with it. Even though Gox was known to be only trading 'Goxcoin' at this point, Trading Bots operating on other exchanges were still clearly reacting to price action on Gox. Gox climbed from $100 right up to $270, as all the other exchanges shot back up above $600, all except Stamp which was stuck at $580, because of the 10K wall. However, because all the other exchanges were trading some $20-$30 higher than Stamp, the bots operating on Stamp kept buying into the 10K Wall.
The 10K whale sold some 6.5K BTC worth of Bitcoin (around 3.75 million USD) at exactly $580, the remaining 3.5K BTC, is market sold into the wall smashing the price on Stamp down to $510, before it quickly recovered on very low volume to around $550.
This is a glittering example of how automated or robot controlled the Bitcoin market is, and of how the by then obviously vacuous Gox trading bots were used to push market down, and then bring market right back up so that almost 4 million USD were spent on $580 Bitcoins, a price that Bitcoin has struggled to get up to and stay above ever since.
I wouldn't expect the whole market to suddenly implode the minute that Willy or any numerous other market ramping systems might be turned off. After all, their are hundreds and thousands of participants in this market, all of whom have bought and sold Bitcoins at prices which Willy helped to achieve, all of whom believed in the prices they bought and sold the coins at. If everyone believes that emperor is wearing clothes, then the emperor is wearing clothes. However, once that insatiable driver of the market is taken away, then there is obviously a very important component of demand removed from the market and the result of that can only be a dragging bear market until either a new driver of demand enters the market or the market reaches equilibrium level with organic market demand.