You can buy some Metal Seed Storage with HW wallet and thus ensure that it will not be lost against shocks, burns, ... etc. a good review can be founded here https://jlopp.github.io/metal-bitcoin-storage-reviews/ and distribute more than one copy in places you trust, thus ensuring that you will not lose it.
If you are afraid that someone will discover it, then use the passphrase option, which is an option that enables you to create several accounts (standard wallet and hidden wallet) for the same wallet seed, so that the standard account does not contain bitcoins or a small amount, and the other contains your bitcoins, you can keep passphrase in a separate place.
learn more here https://trezor.io/learn/a/standard-hidden-wallets