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I meant to write 'our' keys. I think changing them atleast once is good practice. I am not wise enough but maybe given time, someone can write more about advanced steps you can take to make your account impossible for even steemit to shut down.

You likely don't need to worry about it. Store your keys in a safe place and don't forget them. If you loose or forget your keys, just use the default @steem recovery process.

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