How about simply using a regular Bitcoin mixer to send your own funds to a secret wallet (ie. one on a separate computer behind a VPN that's never received coins from an exchange and that has no history or trail back to anything else you've ever done openly with bitcoin), and then spending the coins from there, or else via another single use wallet?
So you're thinking about securing some forward privacy after buying KYC sats on a VEX. If you're going deep cold storage for the long term, it shouldn't be an issue, but if you're planning to interact with services you might want to reconsider
https://thebitcoinmanual.com/articles/considerations-before-coinjoin/
Discussion
But the UTXOs would still have a history of coinjoin, with the current mixing systems we have. I mean if you're never going to hit KYC it wouldn't matter but if you are going to go KYC, you might need to do a Wasabi cucked Coin join to prove your coins aren't terror tokens lol and then you could get access to that liquidity.
To me the better option would be to take a UTXO and fund a LN channel instead and spend from there or submarine swap if you never need to touch KYC onramps
Thanks, not all of that I follow. But what strikes me is at some point it will come back to deniability, and willingness to deny. Bitcoin? What Bitcoin? Well you spent money on bitcoin, so where is it? And if it wasn't bitcoin, on what did you spend the money? Well, I don't have to tell you, you have to tell me. And be willing to do so on pain of audit, interrogation, house search, dragging ones name through the papers and so on. The technical side is the easy part - lost my Ledger LOL.