Please don't do this. We're even discouraging people from using centralized and known crypto exchanges to keep their funds there for long-term holding. If you're going to hold long term, leave PP and use a hardware wallet or electrum for Bitcoin.
"Not your keys, not your coins".
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Cool, yeah.  That would be the ideal.  But honestly most people are too dumb for a hardware wallet, they will do something dumb like store their seed phrase in plain text unencrypted in the cloud or something...