What? People do that all the time dont they? Is it not called capital loss? I had all sorts of capital losses in equipment etc, when I had a small contracting business until it had no value anymore but I still owned it.Claiming a ‘financial’ loss of value for something that is still registered in your name and still possessed by you won’t wash.
I believe you would have to claim it against another capital gain, but I think for personal capital loss against your lifetime capital gains exemption would make it kind of moot with no benefit. DISCLAIMER: This is the opinion of an uneducated person in financial systems and taxes