By , (Reuters) - Tesla Inc customers can now buy its electric vehicles with bitcoin, its boss, Elon Musk, said on Wednesday, marking a significant step forward for the cryptocurrency’s use in commerce.“You can now buy a Tesla with bitcoin,” Musk said on Twitter, adding that the option would be available outside the United States later this year.The electric-car maker said last month it bought $1.5 billion worth of bitcoin and would soon accept it as a form of payment for cars, in a large stride toward mainstream acceptance that sent bitcoin soaring to a record high of nearly...…By , (Reuters) - Tesla Inc customers can now buy its electric vehicles with bitcoin, its boss, Elon Musk, said on Wednesday, marking a significant step forward for the cryptocurrency’s use in commerce.“You can now buy a Tesla with bitcoin,” Musk said on Twitter, adding that the option would be available outside the United States later this year.The electric-car maker said last month it bought $1.5 billion worth of bitcoin and would soon accept it as a form of payment for cars, in a large stride toward mainstream acceptance that sent bitcoin soaring to a record high of nearly...WW…