Is this person still engaged and steadfast in their belief that Bitcoin holds no value? Seriously?
You must name what actual resource is held by a unit.
Says who? Who is the sole arbitrator of the term "asset"?
For instance: unit of gold, unit of debt(fiat money)
Unit of debt is fiat currency, and unit of fiat currency is what? Debt?

No actual asset, commodity or money exists under the name ABC.
There is no tangible asset, commodity, or physical currency known as the "US dollar". Its value relies solely on faith. Nevertheless, it holds a certain value, albeit one that may go unnoticed by many.
