At that point people will just start keeping debt ledgers with each other and carry on without me. Other currencies would pop up. I'd have to spend at volume in every direction just to keep the money from becoming irrelevant.

Depriving everyone else of physical cash would just hasten the spread of electronic transactions into the corners of the global economy where it doesn't already reach: Drug cartels, rural villages in 3rd world countries, etc.

And with that, lack of privacy from prying eyes in governments, banking, and corporate databases.

The infrastructure to accept and process cash would quickly deteriorate faster than you, the one sole cash owner, could spend it, and therefore distribute cash back around the world for it to become useful again.

By the time the physical cash could get sorted, spent, and make its way from your one location, to most places around the world, essentially cash would have become almost worthless, because alternative payment methods would be made, and nobody would be used to using cash anymore.