USDT (Tether)
The most popular and widely used globally.
Backed by massive liquidity on almost all platforms, including Binance.
Its only drawback is that it has some controversy regarding transparency.
USDC (USD Coin)
Issued by Circle and Coinbase, more transparent than USDT.
Backed by declared and organized reserves.
A bit less popular than USDT, but reliable and safe.
BUSD (Binance USD)
Was backed by Binance, but after U.S. regulatory issues, issuance stopped, yet traders still use it.
Currently being phased out, so not preferred for long-term holding, but excellent for temporary trading (if you still have it available).
DAI (Decentralized USD)
A decentralized stablecoin backed by crypto collateral, such as ETH and BTC.
Excellent for people who prefer decentralization and want to stay away from company-backed currencies.
Its volatility is sometimes minor, but it remains a stablecoin.
TUSD (TrueUSD)
A stablecoin fully backed by the dollar and audited by external firms.
Recently backed by Binance, but beware: it has faced some regulatory concerns.
Excellent for short-term and low-spread trading.
My personal advice?
If you want to trade: USDT or USDC are better.
If you want to hold more securely: USDC and DAI are more reassuring options.
And if you like cautious adventure: keep an eye on stablecoin news as they are more sensitive to any legal or regulatory issues.