By Hyunjoo Jin and Subrat Patnaik (Reuters) – Tesla Inc boss Elon Musk denounced the “insane” amount of energy used to produce bitcoin on Thursday, doubling down on his sudden rejection of the cryptocurrency as a means of payment over environmental concerns. Bitcoin fell more than 10% after Musk, one of its most famous backers, tweeted his decision to suspend its use, less than two months after Tesla began accepting it as payment for its electric cars. Other cryptocurrencies, including ethereum, also fell before regaining some ground in Asian trade. “Cryptocurrency is a good idea on many level…

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