there's far more to it... a thing that can have other things attach to it isn't property in itself, it is an estate, to be more strictly correct, primitive, but essentially, yes
Discussion
so is it correct to say that out of all the Web3 excitement, there was just 2 Digital Estates that have been born,
NSECs and UTXO private keys
nsec is worthless, you can have many without any value to them, utxo is valuable
maybe you can make an nsec valuable but the only way it would be really valuable is if it was the master seed key for many UTXOs