In 2018, when Bitcoin was buying and selling round $4,000 and most Individuals, not less than, thought cryptocurrency was a fad, Katie Haun discovered herself on a debate stage in Mexico Metropolis reverse Paul Krugman, the Nobel Prize-winning economist who had dismissed digital belongings as close to nugatory. As Krugman centered on Bitcoin’s wild value swings, Haun steered the dialog towards one thing else — stablecoins.