MicroStrategy plans to raise $42 billion capital over the next three years to expand its Bitcoin holdings.The company currently holds 252,220 BTC (~$18 billion) and intends to buy more BTC as a treasury reserve.Phong Le, President and CEO, announced the '21/21 Plan' targeting $21 billion of equity and $21 billion of fixed-income securities.Bitcoin's price saw a recent rise above $70,000, with trading volume down 39% today.