Circle, the operator of the $28 billion stablecoin USDC, announced that it will stop issuing USDC on the Tron network, according to Bloomberg. The decision stems from a "risk management framework" that "continuously evaluates the suitability of all blockchains for stablecoins." TRX, a token associated with the Tron blockchain, is at the center of U.S. fraud charges. Regarding Circle's move, Tron founder Justin Sun said: "We are currently understanding the situation, and this appears to be a unilateral business decision by Circle." According to CoinGecko data, stablecoins account for about $140 billion of the $2.1 trillion digital asset market. The market value of stablecoins on the Tron network is $51.5 billion, most of which is USDT.