On Binance Smart Chain (BEP20), the fee is much more lower, BNB and USDT are both on BSC, the fee also is both low and should be the same.
This is why alot of users are moving to Binance Smart Chain. It even cuts across the binance pegged BUSD which is even zero charge or less than nothing when moving it from binance to some apps like the Trust wallet. On the contrary, the high fees of bitcoin and ethereum withdrawals is nothing to write home about. The high charges makes you conclude that traders and investor's concerns are not considered at all.
BNB is the way hands down. USDT to me still seems a little unstable and considering the law case, personally I try to stay away from it whenever possible. BNB is the coin leading BSC, so I can only imagine it will increase in popularity. For sure, there are other stable coins representing other blockchains but seems like BNB is still the largest to this day.
DOT is also another one to my view to keep an eye out because the parachain layer 1 solution is going to be huge, with more projects soon building on it. You only need to take a look at the
Polkadot Master Ventures VC found to get an idea of what's coming.