A stablecoin called TerraUSD (UST) imploded this week, causing billions of dollars in losses and raising the question of why any cryptocurrency — or even a government-issued fiat currency, for that matter — would ever want to have its value pegged to some other currency. Why it matters: Nowadays, most currencies float freely against each other. Historically, however, that's something of an anomaly. Indeed, as recently as 1971, even the U.S. was part of the Bretton Woods system that pegged all currencies to a gold standard. The big picture: Pegs get introduced when market forces generate a level of volatility that ... (full story)