I have one main wallet, but I used a truly random method to generate my mnemonic phrase, using dice rolls, verified by a python script to be correct. Furthermore, I have added an additional bip39 passphrase which is kept in a separate location, and it's all secured by an antiphishing hardware wallet. This is where my main coin are, then I also have another wallet with less coins.


A quantum computer with at least 1 million qbits is necessary to have a chance at cracking bitcoin addresses, and we are far, far away from being able to achieve that. I am not concerned at all by quantum threats.