Jack Dorsey’s Mainstream Dream Faces Test as Block Joins S&P 500

Jack Dorsey’s Block Inc. joins the coveted S&P 500 on Wednesday, a symbolic milestone that puts the digital finance firm — pursuing everything from mobile banking to Bitcoin mining — under Wall Street’s spotlight.

For a company that helped pioneer mobile payments, the real test now is turning big ambitions into profit-driving execution: converting Cash App’s large user base into full-fledged banking customers, scaling Square’s product arsenal, and competing in the cutthroat world of Bitcoin mining.