BUSD (Binance USD) and USDT (Tether) are both stablecoins pegged to the value of the US dollar. The legitimacy of each depends on factors such as your use case, platform preference, and trust in the issuing entities. BUSD is issued by Binance, while USDT is issued by Tether.
To assess legitimacy, consider factors like transparency, regulatory compliance, and market acceptance. Both BUSD and USDT are commonly used in the cryptocurrency space, but it's essential to stay informed about any updates or developments related to these stablecoins.