Do you believe that one day people are going to move on BSC to sell their NFTs?
Some are already moving there to save fees.
if not, why, what does make people choose Ethereum?
It's because of the volume, despite the high fees, they're staying because it's already been there. It's hard to change that way of transacting if most of their funds and NFTs are already in the network of Ethereum. But as long as there's a way to see the other chain of BSC supports the same, it's good for us because we can choose the network that we want to transact.