We are in the midst of a "Fourth Industrial Revolution" in which technology is advancing at an exponential pace, bringing us mostly digital tools and processes. In the tax world, "digital" translates to: "how do rules designed for a tangible world apply?" Cryptocurrency is a great example to remind us that tax as well as other laws and compliance processes need to be fluid to keep our economy moving ahead. Inaction or inappropriate responses can shut down or decelerate advancements that benefit society and lead to further technological progress.