As cryptocurrencies gain in popularity, businesses take note

Last November CheapAir became the first airline to accept Bitcoin and then later, the first to let travelers book hotel rooms and Amtrak train seats with the digital currency. Since then its Bitcoin sales have topped $1.5 million, an amount that exceeded the company's initial expectations, Jeff Klee, CEO of CheapAir, tells Forbes.com.

CheapAir decided to expand its array of digital currencies that it supports after receiving requests from the developers, Klee says. He is less sure of their momentum, given their smaller user base, but Klee is willing to take a flyer.

"In general I am very supportive of alternative currencies and the technology is very promising." Like many company executive Klee is delighted with the cost savings digital currencies offer companies like CheapAir.