Thanks for advice. I guess, let me check ATM. (at least for small amount).
For large amount like 5 BTC, I will keep checking, what would be best to keep it straight.
Cashing out small amounts shouldn't be a problem at an ATM.
If you actually wanna cash out 5BTC you should just get a tax consultant that is familiar with cryptos or specifically bitcoin. Paying a few houndred $ won't make a huge difference on your earnings and you will be on the safe side of the law