On Coinbase, is my Web3 wallet directly tied to Coinbase or is it standalone? If Coinbase goes, does my wallet? Can I access my wallet without Coinbase? Plus RP ETH staking.

As titled. I’m specifically looking to stake my Matic. I don’t have many wallets external to exchanges besides my Trezor where my Matic is currently stored. I feel I want to stake Matic at this stage but I can only really see an avenue using Web3 Dapps via the Coinbase app.

All good, I’m pretty sure I know how to get the funds into my wallet and onto Lido. I’m just wondering though if my coins will be ‘my coins’ if stored in the Web3 side of the Coinbase app. I’m a little bit weary or keeping all my coins on Coinbase as I’m already staking DOT through them. Don’t want all my eggs in one basket…

If my Web3 wallet isn’t owned by Coinbase, how would I access it from elsewhere if Coinbase went under? I haven’t seen any seed phrases anywhere so don’t know if I could log into it if anything were to happen.

On a side note. I’m also considering staking my ETH through Rocketpool. If I did stake my Matic, already have my DOT staked and staked my ETH, would you consider that wise?

Any help greatly appreciated as always ????