It's also the opportunity to make it clear to everyone that it now accepts Bitcoin as payment. It wasn't revealed how much this customer paid for their Model S, but in dollars it was likely over $100k – it was the high-end Performance trim. But in case you aren't aware what exactly Bitcoin is, it's basically "an open source person-to-person electronic tender that uses cryptography to secure transactions." They're impossible to duplicate and they've actually been around for a few years now but it wasn't until more recently that they've become more popular. And like the stock market, Bitcoin prices fluctuate just like any other currency.