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Largely, this question boils down to one thing: does the wallet software let you control the private keys for your coins? Or not?
If the wallet does not let you control your own keys (ie a custodial wallet), then it is up to the custodian to craft and publish your transactions. Obviously, this gives the custodian ability to censor your transactions at will.
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There are multiple ways in which you can update Bitcoin Core to the latest version. Each one has its own advantages and disadvantages:
Build from source code: You can always update your software by cloning the git repository. This way you can verify the code and build the binary yourself. However, it is a resource intensive task and you will need to ...
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