The first businessman to get into crypto in a major way was likely Jed McCaleb, who founded Mt. Gox in 2010, one of the first Bitcoin exchanges. However, if you’re looking for a more mainstream business figure, Barry Silbert (founder of Digital Currency Group) and Roger Ver (an early Bitcoin investor) were among the first major entrepreneurs to invest heavily in cryptocurrency.
It also depends on what you mean by “businessman”—Satoshi Nakamoto, the pseudonymous creator of Bitcoin, could be considered the true first mover. Let me know if you’re looking for someone in a specific industry or time period!$BTC