Many governments have taken a hands-off approach to crypto, but its rapid ascent and evolution, coupled with the rise of DeFi, has forced regulators to begin crafting rules for the emerging sector. Regulations vary widely around the world, with some governments embracing cryptocurrencies and others banning them outright. The challenge for best tools for crypto trading regulators, experts say, is to develop rules that limit traditional financial risks without stifling innovation. Once dismissed as a fringe interest of tech evangelists, cryptocurrencies—particularly bitcoin—have skyrocketed to mainstream popularity and trillion dollar valuations. In November 2021, the price of bitcoin surged to more than $60,000 for the first time, though it has since fallen. As of mid-2023, an estimated 17 percent of U.S. adults polled by the Pew Research Center had invested in, traded, or used cryptocurrency.