The expression 中国 大妈 literally translates as "Chinese auntie." The phenomenon of the zealous and thrifty Chinese middle-aged woman has been known for a long time, but only in the midst of 2013 was a neologism thought up for it.
At the height of the hysteria in November – December of last year, when the crypto-currency’s rate rose from US$200 to US$1200 within a month, the ‘Chinese auntie’ accounted for up to a quarter of the global turnover of Bitcoin. She was not mining coins, buying LSD on Silk Road or order murder from deep inside the Internet. She speculated and had fun.