As long as you can prove that you owned it for 12 months before selling you're fine -> After 12 months send it to a whirlpool etc. to brake the link and then start spending when needed ✌️
Discussion
👀 Are you sure?
Mixing just means new address for approx same btc amount. Isn't that a new obtained Bitcoin to the tax office?
What is a taxable event? Holding btc for 12m and a day? Doubt it.
I'd say it's spending it after at least 12 months. But what if you spend it partly?
Taxation is not a simple theft but advanced game where you lose the most.
After 12 months you can do whatever you want without reporting. That's at least what I know. But I'm not an expert as I'm personally not affected ✌️