Like a 21st-century space race, the world's biggest economic powers are staking their claim in a little-known type of digital currency that could revolutionize — or severely disrupt — the way people, companies and countries exchange money. Stablecoins are a type of cryptocurrency pegged to a country's national currency, or to commodities like gold. The idea is that their value is linked to a stable asset, and is therefore less prone to volatility than regular crypto. Think of it as a "digital dollar": Stablecoins have a one-for-one exchange rate with their real-world twins, which investors keep in a reserve as ... (full story)