If you don't grasp that DASH has fixed Bitcoin's fungibility issues, you are the idiot, not me...
Please read a book on economics.
fixed.
All DASH are interchangeable, mixed or not.
"Fungibility is the property of a good or a commodity whose individual units are capable of mutual substitution. That is, it is the property of essences or goods which are "capable of being substituted in place of one another."