I don't know what is a best word to use to say about Bitcoin.
Magic internet money 
On a more serious note: all of the terms you mentioned work just fine. There's more than one way to describe Bitcoin.
Yes boss, is the language crack to widen the spread and values of bitcoin but all works in the same direction as said. People can describe it according to what works for them because it expands another aspects of bitcoin as a new technologies to draw more attentions.
Like Facebook, Instagram, tik tok and all. They sounds different but most likely to perform similar functions