I think, this is a good idea.
Recently my other address (main one) with my email&blockchain account.
So i am signing a new address for all my future trades from the old one.
Address: 15o5KSW9CVJLFUp9gcx7Yu2RTPjNsAKw5S
Message: I'm Roboabhishek and today is 18th May. For all my future trades Address: "1CjgsXAjvfhUKqtjPzCAMCF5tdB2GpfxC4" Should be used.
Signature: H0xHtQScYOTTwYYByDWLHCRUi1Rw434PCCGrWInljQxTVlFtanBh33GQGKCduqReLf987lPOx/yKPu4yOrDlDU0=
New address: 1CjgsXAjvfhUKqtjPzCAMCF5tdB2GpfxC4
Address: 1CjgsXAjvfhUKqtjPzCAMCF5tdB2GpfxC4
Message: Today is 18th May and i am signing this message from my new address for all trades in the future
Signature: IP4Iy6tHaO20ir/QMXoNPeZsuAgGxCDhd04C0pzD3Ep2RUqZesySHCFxi736HQgHS2tPm10Rh7gjpI7KHsavI2s=
Link to my thread's post:
https://bitcointalk.org/index.php?topic=2220514.msg37611115#msg37611115