- By CNBC
Cryptocurrencies have surged with help from Tesla CEO Elon Musk. Tesla recently bought $1.5 billion worth of bitcoin and said it would allow customers to buy cars with bitcoin. And leading up to his “Saturday Night Live” hosting gig, Musk talked up digital currencies like dogecoin. But now, Tesla says it will stop accepting bitcoin as payment amid concerns about the environmental impact of mining crypto. CNBC explains what these currencies are, how to buy them and what the concerns are.