One way to think about it:
Bitcoin removes trusted third parties.
But it also removes "privacy by default".
Everything is transparent unless you actively design against it.
Tools like zpubs are useful.
But they are also dangerous if misunderstood.
This is why security is not just cryptography. It's architecture + behavior + information exposure.
More here → 
BitVault Blog
From a zpub to your private key: the hidden risk most people miss -
By mordom
Once you internalize the UTXO model, Bitcoin stops looking like a bank account system and starts looking like a distributed ledger of spendable outputs.
👉️ 
Your mnemonic isn’t “a backup.” It’s a deterministic key generator encoded as words.
Entropy → seed → derivation path → address.
If you don’t understand that chain, you don’t understand custody.
Full breakdown: 
