bro you must be on something different.  in bitcoin you control your own keys.  on coinbase no, but using actual bitcoin you have control.  you can even reference a node and still keep control but leak data.  the hardware wallets direct you to their node, but they're compatible with your own node.  when you use other coins it's pretty likely you don't have control. only bitcoin set a blocksize limit while other chains just removed full node features and changed the definition to an archive node.
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