TL;DR You should happily be paying a 5-8% premium and putting the extra effort for purchasing Non KYC Bitcoin. The reason being, Non KYC Bitcoin will never be cheaper than it is now. If your Bitcoin is non-KYC'ed, you will always be able to sell it make at the same premium. However if shit hits the fan, and governments try to block the exits, your Non KYC Bitcoin will be worth considerably more.
Before going into the benefits of Non KYC Bitcoin, I just want to give a general guide on how to obtain it because it is not as hard as you might expect.
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To make your purchase untraceable, you want to try and purchase your Bitcoin through the Lightning Network. This can be done via RoboSats (If you are in US or Europe, there are always tons of options) or with Azteco Vouchers. Certain KYC exchanges also allow you to withdraw via Lightning. If you cannot use any of these options, try tracking down a Bitcoin ATM that accepts cash and does not require KYC. Buying over Lightning means that your Bitcoin has no clear "origin" on-chain.
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When you have your purchase in Lightning, you can use Muun Wallet or dedicated swapping services like Boltz to swap your Lightning Balance for On-Chain Bitcoin.
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Next, which is perhaps the most important part, is to carry out a Coin Join, so that you coins trully become untraceable and anonymous. I prefer to use Wasabi Wallet for this, but there are many other options you can explore. Please do your research. Once you coins have been coinjoined, move each UTXO you end up with individually without mixing them, to a new unique Address from your cold storage. Congrats, you now have 100% uncensorable money! Now the rationale going through all this trouble goes beyond just "Good Privacy Practices", I believe there is a clear economic incentive in doing so. Options for purchasing Bitcoin in a Non KYC fashion are becoming gradually fewer and fewer because of the government and the banking sector pressure. At beginning of Bitcoin's history, almost all Bitcoin purchases were Non KYC, now I wouldn't be surprised if it's less than 10%.
It will be getting harder and harder to find Non KYC options in the future, especially if you country goes through a currency debasement event.
The few options that are left will be able to charge much higher premiums in the future... So I estimate you are better off acquiring this Non KYC now at the current premium rather than later when you might really really need and you pay a much larger premium.
Furthermore, that additional cost you paid for that Non KYC is far from "lost", if you need convert back to fiat the following month for example, you can charge exactly the same premium as you were charged for your Non KYC Bitcoin. If, however, you hold on to said Bitcoin for 5-10 years and then want/need to sell, then the premium you could charge could be significantly higher, as high 20%-50% depending on your the situation in your jurisdiction and whether Bitcoin is forced to operate in a Black market. Whatever the situation is, I'm sure you will always be able to charge at least 5% over the current market price.
Finally, keeping the best for last, if you ever need to sell that Bitcoin, you won't need to pay any capital gains tax on it....Which will save you much more money than the premium you initially paid.