Indonesia’s central bank has issued a fresh warning about trading in cryptocurrencies like bitcoin because of the risk of losses to the public and even a potential threat to the stability of the financial system. Last month Bank Indonesia plans to issue a regulation prohibiting transactions using Bitcoin, the regulation would take effect starting next year. Indonesia is not the only country.  From China to Singapore, Asian countries are increasingly uneasy with the rise of Bitcoin. Bitcoin’s price has risen by more than 1,500 percent this year. Prices have declined from their peak, and there are fears that a deeper plunge may reverberate around financial markets.