The private transaction bit though... You then either live off the cash or have a traceable transaction going in to your bank account. Enough of those would raise questions. I guess cash can work, but only to a point. Recent example, new tires on a truck for $1500. Not very many businesses are going to accept cash for that. I'm not at a point where I need or want to sell BTC, but for sure someday I will.

I find it hard to believe a service industry sales point wouldn't accept cash money currency for said rendered services. Find a different bank who doesn't care. In the U.S. that's typically a credit union. Elsewhere, I have no idea. Report your goddamn sales if in the U.S. The IRS will eventually find you if your shit is KYC'ed. Don't go to jail over this very preventable occurrence.