https://www.reuters.com/article/us-crypto-currency-bitcoin-musk-timeline/elon-musk-on-crypto-to-the-mooooonnn-and-back-again-idUSKBN2CU2C5 >Bitcoin's price tumbled after Elon Musk said on Wednesday his electric car maker Tesla Inc would no longer accept the cryptocurrency for purchases, citing environmental concerns for the reversal.