Difficult topic and I also keep thinking about it.

We don't know the future.

What if you live in a country where the government decided that it is illegal to sell non KYC sats?

Of course you would still be able to sell them P2P using robosats or alike, but at a discount and with risk.

Or you wound have to move to a different country.

So it may be good to have some KYC stack, too. Pay the capital gains tax on it when you sell, so they cannot go after you.

That's my thinking, for whatever it is worth.

So, for new buys, buy some on robosats, and some using some soft KYC exchange.

And send them to two different wallets.

It can be on the same hardware wallet you already have, but with different BIP39 passphrases, like the 25th word.

So you will have a hidden wallet number 2 and 3, with different passphrases, where you keep, separately, your newly bought sats.

Read about BIP39.

I am not sure about coinjoin. It makes it visible, coins may be consideted tainted.

You could also send them to Liquid, ie swap to LBTC using sideswap io, then send to lightning using Boltz exchange, then back. It should hide the trail, too, giving you forward looking privacy. Or ability to claim that after you sent coins to liquid you lost the key.

Swap them out using a new phone or desktop and via vpn such as proton kr mullavad or ivpn or tor.

Just in case. Good luck.