The saying goes that, “You can’t teach an old dog new tricks.” That may or may not be true, but at least one “old dog” is working hard to disprove that saying. Western Union has been operating in the cross-border payments space for nearly 150 years (yes, you read that right – 150 years) and today, globally, it serves almost 150 million customers – representing senders and receivers. In recent years, a number of fintech startups have emerged to challenge Western Union in the massive space – from Wise (formerly…