An anonymous reader shares a TechCrunch report: Bitcoin is back! Or at least, there are positive signs indicating that bitcoin might not be as dead as everybody thought. Bitcoins are now trading at $547.40 on Bitfinex (the largest USD/bitcoin exchange according to Bitcoinity). And it represents a big 21.4 percent price jump over just four days. Today's price represents a 21-month high. Surprisingly, bitcoin prices had been relatively stable for the last two months before this weekend's jump. What's the reason behind this jump? It's hard to say. Huobi and OKCoin, the two dominant Chinese exchanges, have seen many new sign-ups, as well as many buy orders. Increasingly, bitcoin's price variations are correlated with macroeconomic trends in China. These trends tell us that China still fears a deflation.