“I think there are two or three main considerations [around going multichain],” Lee said. “The first is, we do want to get this initial wallet out into the world and see what user feedback is like. I think the demand for multichain is something that we’re going to keep at the forefront if a lot of users are asking for it … I think number two is, if we think that going multichain ends up delivering a better, more liquid decentralized trading experience, that’s also something that will prompt us to go multichain. And the third is, in the future, as we look into use cases like NFTs, we think multi-chain might be a great, great way to achieve that goal.”

https://techcrunch.com/2022/09/27/robinhood-polygon-crypto-web3-noncustodial-wallet/