So a lot of people have heard of Bitcoin, but there are many more people that have not. If you live in the crypto currency space, like I do, you sometimes forget how far away from mainstream Bitcoin and other crypto currencies are. But, that may already be changing. This from an article by Sean Williams shows just how far blockchain technology has come in the past few years. "Just over a week ago, financial giants American Just over a week Express ( NYSE:AXP ) and Banco Santander ( NYSE:SAN ) announced a cross-border partnership that entails utilizing the blockchain network developed by Ripple. Behind bitcoin ($137.4 billion), Ethereum ($35.2 billion), and bitcoin cash ($20.3 billion), Ripple has the fourth-largest market cap ($9.1 billion) of any virtual currency. As reported by CNBC , payments made by American Express' business customers on its FX International Payments platform will be routed through Ripple's blockchain network and allow for instant, cross-borde...