Ofcourse, the physical part of NFT is one of the most important thing that will make a difference. NFT backed by physical asset can be used as collateral online/offline... But I wish the company (4k) provides private vaults they can't even access, so that once someone acquires an NFT that is backed by physical asset that is in the vault the new owner automatically controls the keys that can unlock the vault. If an owner is far away, he/she can send the keys to the company to have the asset transferred to him/her. With this, you fully control your asset once a physical asset backed NFT is acquired.. I prefer a non-custodial company.