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my preference
  1. one key with me wherever I am
  2. one key with someone i trust far away
  3. one key in a safety deposit box
i make metal backups of each key which i store with the remote hardware wallets. if you're insecure with 2-of-3, it may be time to consider 3-of-5.
you can also store the third key with a collaborative custodian, which is cheaper than a second residence, but that has its own tradeoffs.