I feel like this is a problem that is pretty commonly exercised in our legal system and incarceration is usually a strong last resort motivator.
I feel like this is a problem that is pretty commonly exercised in our legal system and incarceration is usually a strong last resort motivator.
This is just the tip of the iceberg BTW. What if they die or have a brain injury? Their password securing the wallet is now lost to the world. Now there's no way to reverse this transaction. We accept this risk with the trustless system of currency. But real estate, equities, this kinda stuff -- it just doesn't map well at all.
One other potential problem is that if an owner of some Bitcoin dies, there may not be access to their wallet at all. However, if there is considerable wealth in that wallet, they should have incentive to pass that on to their heirs, in which case they may have set up a will or otherwise passed on instructions for how to recover the money. Whoever that money is recovered to can then be approached for settling the estate or what-have-you.
In the end, though, laws and the consequences for breaking them are (in principle) set up to incentivize behavior that is good for society. If you break laws, you face consequences. If you avoid those (e.g. court orders you to pay and you refuse), you face other/worse consequences (e.g. garnished wages, contempt of court). If the consequences still aren't strong enough or enforceable enough to maintain the peace, then society has a problem and new laws can be passed.
The problem is using blockchains to represent shares in a company (for example). Ownership of a company can't be "lost", or "unpaid". Legally, someone owns each share of a company, and a court can declare ownership is moved. At that point, your blockchain doesn't represent reality any more (as declared by a court) and then, what value does it have?
Can a court actually declare that ownership is moved, or can they only declare that one is to transfer ownership, implicitly under penalty of something else if you don't? If you have a car and the court declares that it is my car now, that doesn't physically transport it to my driveway and you could steps to prevent that from happening (eg, driving it into a lake).
When it comes to things like houses, a court certainly can declare ownership is changed, there is no option for you to refuse, or have to do anything.
This already happens without block chains.