Lets see where the price of btc really bottoms out...
At the time (and even now), many bitcoiners totally ignored China, and assumed that the Apr/2013 and Nov/2013 rallies were "Western" things. While the causes of the first are still debatable, the Dec/2013 crash and the events in Mar--May/2014 should have been enough to prove that the Nov/2013 rally was due to Chinese demand.
A comparison of the prices among the various exchanges shows that Bitfinex and BTC-China were clearly leading the Apr/2013 rally, while the Nov/2013 one was pulled BTC-China, Huobi, and OKCoin (ad possibly other Chinese exchanges for which I have no data).
Popper's book (in the excerpts that have been published elsewhere) seems to say that the April/2013 boom was due to big whales like Andreessen and the Fortress Group investing lots of money in bitcoin, after attending a bitcoin presentation by Wences Casares in March 2013.
As I wrote before, my own favorite theory is that the first 2013 bubble started in January, when BTC-China and Bitfinex made bitcoin popular in Shanghai and Hong Kong. My guess is that Mark or some other MtGOX insider decided to profit from the bubble by trading in China with the customers' bitcoins. That guy then created Willy, a robot which would buy bitcoins from other MtGOX customers at a 10% premium with non-existent dollars. The gy then would withdraw those coins and sell them in China. The plan must have been to bring the revenue from those sales out of China, and use part of it to fill the clients' dollar accounts, pocketing the profit.
That scheme apparently continued all through the Nov/2013 peak. But the plan would have collapsed in Dec/2013 when the PBoC blocked the accounts of the Chinese exchanges. Otherwise, the purchases of bitcoins by the Chinese during 2013 would have meant at least half a billion dollars in CNY leaving the country, in exchange for a bunch of "worthless nothings" that had been imported without licenses or taxes...
By the way, Popper's account is not incompatible with this theory. The big investors who started buying in March/2013 may well have bought at Bitfinex, or even at BTC-China, for reasons of liquidity.