It's worse than just liquidity, if he can unlock his wallet on his phone to verify it and its balance on the spot.... not only is it liquid but he's effectively

It's worse than just liquidity, if he can unlock his wallet on his phone to verify it and its balance on the spot.... not only is it liquid but he's effectively carrying it on himself in cash at all times. At least it's only $2.5 million or so remaining, since the rest is now likely in assets that require more effort than merely access to this person+phone (and attempts to rob a person of assets in a bank are usually more traceable than stealing bitcoin). Still seems a bit crazy though.