https://www.reuters.com/article/us-crypto-currency-microstrategy/microstrategy-to-borrow-600-million-to-fund-bitcoin-buying-idUSKBN2AG1LA >MicroStrategy Inc said on Tuesday it would raise $600 million through a sale of convertible notes and use the proceeds to buy bitcoins, adding to the U.S. company's steadily growing investment in the cryptocurrency.