Stablecoins are a form of digital asset usually
pegged to a fiat currency
that give users a hedge against the volatility that can afflict cryptocurrencies like bitcoin
(BTC)
. The major stablecoins are all pegged to the U.S. dollar, of which Tether's USDT is comfortably the largest with a market cap of over $117 billion. USDT accounts for a share of the stablecoin market of nearly 70%,
according to CoinGecko data
.