$USDC Stablecoins are considered important tools in the cryptocurrency market, as they aim to reduce price volatility by pegging their value to stable assets such as the US dollar. Among the most prominent of these coins are USDT (Tether) and USDC (USD Coin), both widely used in trading and digital fund transfers.

Explain the general concept of stablecoins, then clarify the main differences between USDT and USDC in terms of issuing authority, transparency levels, financial backing, and their acceptance across different platforms. You may support your answer with examples from the digital market.