Tesla has suspended the use of bitcoin to purchase vehicles, chief executive Elon Musk says, citing concerns about the use of fossil fuel for bitcoin mining.
Bitcoin, the world's biggest digital currency, fell more than seven per cent after Musk's Twitter post on Wednesday and was trading at $US52,669.
Musk said Tesla would not sell any bitcoin and intends to use bitcoin for transactions as soon as mining transitions to more sustainable energy.
"We are also looking at other cryptocurrencies that use (1% of bitcoin's energy/transaction," Musk said.
Musk said in March Tesla customers can buy its electric vehicles with bitcoin.
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