The fintech company's CEO has his eyes on a booming digital asset. With Square for merchants and Cash App for individuals, Block (SQ 1.77%) operates two thriving ecosystems. These two segments are leaders in their respective markets, a standing that has led to this business carrying a $45 billion market cap. Since its initial public offering in 2015, this top fintech stock has doubled the gain of the Nasdaq Composite Index. However, it's currently 74% below the peak price set in August 2021 (as of May 17). ...