It's dull and not at all sexy but this spike may have much more to with Single's Day in Mainland China and a sense that with 'dark' use of Bitcoin being curtailed it stands a better chance of moving into the mainstream.

Bare (or bear) in mind that Single's Day is the second largest e-commerce day (after Black Friday) on the globe and a growing proportion of online trade in China is performed with BTC - increasingly using just-in-time means that buy the BTC at market rates.