I hope so. Money in a McDonalds bag would smell. And that is so unrefined.
I had a real estate closing one day for a guy that ran a local burger joint. About 10 minutes before the appointment I began to smell hot dogs. I walked up front and he was there with a paper bag containing $50,000 in cash.The bottom of the bag was so saturated in grease that the bottom was about to fall out. I can't take more than $10,000 in cash unless I fill out IRS paper work. So I sent him out to get a cashier's check. He came back with about 10 checks. I think he went to every bank in town.
When I was in the UK I needed a UK back account, mostly to pay all my UK bills, Cars, house, utilities, etc.
Also, as an aside, for UK tax purposes it had to be an offshore bank that I could trade in the UK - see Isle of Mann
What I was amazed about was that most every quarter I transferred >$10K into my UK account, no questions asked.
As long I xfered the money between accounts I owned, the IRS didn't give a damn, but the gave a BIG damn at tax time about the amount in the UK account, oh boy did they!
BTW, in a note of WIERDNESS, the UK tax year is April 6th - April 5th - why, I haven't a clue