Why just two lock vaults and not some army bunkers, together with the nuclear codes preferably?

At some point this level of care becomes more than absurd.

> makes up hypothetical situations

> attacks his own hypothetical situations

The site is slowly replacing all users with ChatGPT instances that don’t comprehend grammar or tone.

No, I was attacking your idea that it's somehow common sense that the best way of storing BTC is by working with multiple banks (!!!) to store various key fragments, by showing a more extreme version.

Of course, if someone did follow your example, and then the government compelled the banks to hand over access to the physical tokens, other people similar to you would come out and say "not your keys, not your bitcoin", or insist on even more byzantine forms of secret protection.

Not to mention, with your proposed scheme, actually using your BTC becomes significantly slower than any international bank transfer.

What do you think banks do? When you store a -lot- of value like a pile of gold bars, you are going to need more than a foam and aluminum hotel safe.

For me as a consumer, storing money in a bank is far simpler and more convenient and more likely to not get me burned than it is to store various hardware tokens with various banks (having to physically retrieve them when I actually want a purchase).

So, if the only way to secure BTC is to this cold wallet dance, then it's clear BTC is not a usable store of value compared to USD.

The only way to secure a -lot- of BTC. Or you can pay a custodian to do it for you. You have the same options as cash.

Most people do not store millions in cash or gold at home.

Shamirs still requires having the (single) private key present for signing.

Multisig is far superior for Bitcoin security. The keys can remain geographically separate at all times. Each signing operation requires only the partially signed transaction (PSBT) and the other public keys.

Non-issue if you only use the key once, then do a new split each time. Plenty of tooling exists to make this easily in reach with a simple shell script.

Why would you use Shamirs when the Bitcoin protocol has a superior mechanism built in?

SSS is a good solution for other key material, and for storing a paper key to be used for recovery purposes, but it's completely inferior to multisig for normal management of a shared and/or large Bitcoin wallet.

Well, bitcoin is not the only type of secret one needs to protect. GPG keys, other cryptoassets, password manager master encryption keys, etc etc.

I like to have one solution that can work for my entire cryptographic life.

I just love the idea of going around creating accounts at multiple different banks for storing of parts of the key.

Then, when you're finally ready to access you funds, creating appointments at all those different banks, driving to them all, and then finding out enough of the keys are completely missing that you now cannot access any of your funds:

https://www.nytimes.com/2019/07/19/business/safe-deposit-box...

Or... you know... you could just store your funds in one or more bank accounts.

A great success for the idea that your BTC is a store of value not dependent on traditional financial infrastructure - now it takes the a whole morning and cooperation of 3 banks for you to get at your money.