Amid China's nationwide regulation campaign against cryptocurrency mining and trading in recent weeks, the price of bitcoin and other cryptocurrencies have seen a new round of volatility, providing global investors another lesson about the financial risk in virtual currencies. The price of Bitcoin once tumbled below the key $30,000 level this week, according to CoinDesk, which marked bitcoin's lowest price since January. The sharp fall also dragged down the prices of other cryptocurrencies. China's intensifying regulation on cryptocurrencies began from a meeting of the State Council's Financial Stability and ... (full story)