It is funny.

• Is it easier to confirm control of bitcoin or gold?
• Is it cheaper to secure bitcoin or gold?

I can do both of these without a trusted third party with bitcoin.

What if all the computers are killed?

DO you really think that level of disaster would not affect how has your gold in vaults for you? You really think that contracts will survive?

Gold has some advantages but they over-sell it and undersell bitcoin IMO.