The "cache wallet" in fact are many wallets, with many addresses. Some of them could be disposable wallets, using them only once or few times.
Some of them are decoy wallets (could be custodial non-KYC) where you use them only to deviate the "attention" from your other cache wallets.
When I say use the 3 levels, it doesn't mean to use only 3 wallets. It means to use many wallets and apps. Each one with its own use case.
