“Blockchains don’t scale.” You’ve probably heard this a million times. A couple years ago, it felt like a real threat to the industry. How can we bank the unbanked if we can’t even process 15 transactions per second?But big problems fuel innovation. And blockchain scalability was a big problem. It quickly caught the attention of engineers and scientists, and, fast forward to today, we’re getting more and more confident that blockchains can scale.