I'm pretty sure once you've purchased your Bitcoin you don't need to leave it on that place of no physical address. Just lock it away in cold storage.
At least that's what I would presume.
How do you past audit requirements?
The Esuperfund Auditors have tightened up the audit process. They demanded I produce a holding statement for other physical assets.
How exactly do you prove you still have the BTC under a cold wallet, of course you will never provide the private key to the wallet. So not one can independently audit it unless you transfer it back to the exchange and get them to produce a holding statement.