Meet San Antonio’s cryptocurrency pioneers

Clay Saliba, the general manager of George Plumbing Co. in San Antonio, surprised customers when he began offering services in exchange for cryptocurrency seven years ago.

With a bachelor’s degree in business from Texas State University, he’d started working for his father a few years earlier, when Bitcoin came on the scene. It was, and remains, the best-known cryptocurrency — the digital money bought and sold without the involvement of governments or their central banks.

Saliba taught himself the ins and outs of crypto — like blockchain, the digital ledgers that record each time the currency changes hands over the internet. He admires how a far-flung community of bitcoin miners use powerful computers to authenticate cryptocurrency transactions.