https://www.reuters.com/article/us-crypto-currency-microstrategy/bitcoin-collector-microstrategy-fills-its-wallet-with-another-1-billion-idUSKBN2AO1NL >Major bitcoin corporate backer MicroStrategy Inc said on Wednesday it bought another 19,452 bitcoin, worth around $1.03 billion, swelling its holdings of the cryptocurrency and sending the company's shares 8% higher in premarket trading.