I've been using my staked vanity address 1MocACiWLM8bYn8pCrYjy6uHq4U3CkxLaa for business purposes and tipjar purposes for a really long time... I'm now thinking about claiming some of the forked off altcoins that have unspent outputs funding this address...
Because i'll probably be importing my private key into a couple of wallets i don't fully trust, i'll be staking a new vanity address. This new vanity addresses's sole purpose will be to sign messages, so i'll probably never have to change it again:
1MocacinXMCF96Gs3CSp7p2NrjhFXe3Wuv
-----BEGIN BITCOIN SIGNED MESSAGE-----
I'm mocacinno, i'll be using vanity address 1MocacinXMCF96Gs3CSp7p2NrjhFXe3Wuv for signing messages from now on. This message is signed with my old vanity addy to proof i still hold its private key to! Today is the 30th of april 2018
-----BEGIN SIGNATURE-----
1MocACiWLM8bYn8pCrYjy6uHq4U3CkxLaa
G9wc0ZkX3luA2DBBR7kFs66wmGuvY0l8+Edq2c2UPGrSWrfKtJmr/1LYKqMylEhn/jtoMt5lwaO2b2sXvwDXFH4=
-----END BITCOIN SIGNED MESSAGE-----
I've verified the message using
https://blockexplorer.com/messages/verify and it was valid... I know how to sign messages anyways