Why are Mara and Riot, the world's top Bitcoin miners, underperforming Bitcoin?During the past three years, Bitcoin's (BTC 1.05%) price surged more than 450%. The world's top cryptocurrency rallied as interest rates peaked, its first spot price exchange-traded funds (ETFs) were approved, and its latest halving cut the rewards for mining in half. The growing adoption of Bitcoin among retail, institutional, corporate, and even government investors made it seem like a more viable hedge against inflation and ot ...