Cryptocurrency hardware manufacturer Bitmain is reportedly planning to suspend the sale of machines in mainland China as a reaction to an increased state crackdown on digital currencies. Although Bitmain has not officially commented on the matter, three sources privy to the issue noted that the company was looking to move to another friendly jurisdiction, CoinDesk reports. The sources include two who buy machines for leading mining pools while the third works with Chinese miners. According to the sources, Bitmain plans to relocate a significant section of its production from the Shenzhen region. However, the next destination for the firm has…