My experiences with the IRS have been nothing but positive over the years. They were always polite and clear in their positioning. They either made correction

My experiences with the IRS have been nothing but positive over the years. They were always polite and clear in their positioning. They either made corrections in my favor or sought more information to identify what if any additional taxes I owed due to a mistake in my filing. What I suspect is happening here is that the IRS is figuring out how to prioritize it's investigations. Sign or don't, it only determines when you are investigated. Once they've identified a holder of bitcoin it's likely that an investigation will be forthcoming.