I think BUSD would be the most in-demand after USDT since it tied to the Binance exchange and will have huge number of users because of it. Most other stable coin doesn't really have any unique advantage compare to both USDT and BUSD for now.
BUSD is actually only used in the Binance exchange and it doesn't make much of an impression since very few trading pairs use BUSD. In my opinion, USDT is still the number one choice for everyone because USDT is available anywhere and can be easily switched to Fiat anytime you want. Besides USDT, perhaps stable coins like USDC, TUSD are also very potential choices for investors.