When I tell people about bitcoin and I want to give an example of something bitcoins are good for today I usually use the example of international money transfers. Recently I successfully transferred some money to my sister (about $50), who is currently living in South Korea. It was not exactly the smoothest experience ever but I think it demonstrates a real opportunity. Here’s how we did it. About a month and half ago I asked my sister if she’d be willing to give this a try. …