Bitcoin Hoard Fuels One of World’s Biggest Crypto Fortunes (1)

It’s the latest corporate strategy for companies from Tesla Inc. to Square Inc.: shift a portion of cash reserves into cryptocurrencies as digital assets become more mainstream.

Still, few have gone as far as MicroStrategy Inc. Eight months after its first investment, the software firm has a Bitcoin holding worth more than $5 billion.

Shares of MicroStrategy have rocketed almost 600% since mid-July, boosting the fortune of founder Michael Saylor, a billionaire until an accounting scandal in 2000. The chief executive officer is now worth $3 billion, according to the Bloomberg Billionaires Index, joining the ranks of the ...