Bitcoin advocate Michael Saylor's company, Strategy, has upsized its stock offering from $500 million to $722.5 million.The offering includes 8.5 million shares priced at $85 each, with fixed dividends of 10% per year.The funds raised will be used for general corporate purposes, including the continued acquisition of Bitcoin.Strategy currently holds 499,226 BTC, valued at around $41.9 billion.