As the financial system grows and evolves, the way we process payments changes with it. From cash, to checks, to debit cards, we have found more efficient ways to process payments. Popular names in this space include Visa, MasterCard, and PayPal. Square is a mobile payment system that allows people to accept payments via phones and other devices. However, that is not the reason the market is now watching Square closely. News has come out that the company is testing the ability to accept and process Bitcoin payments, which adds another notch to the viability of the cryptocurrency.