Bitcoin is the world’s largest cryptocurrency by market capitalization and is now on rise again pushing over the $40,000 mark for the first time since late May. As you can imagine, the CEO of Tesla, Elon Musk has a lot to do with this price increase. Elon Musk, suggested over the weekend that the electric car manufacturer could start using the digital currency as payment once more just a few weeks after ruling it out because of its allegedly unsuitable energy usage involved in mining.