"Therefore, I propose that bitcoins be defined as digital money. On the other hand, cryptocurrency, digital currency, cash and other traditional forms of ‘money’ should be distinguished as credit."
I do find it interesting in your abstract you do not consider Bitcoin to be a cryptocurrency, as you have defined both separately, one as digital money and another as credit.
Bitcoin is the system. The money is something else, and is what drives the system.
In cryptocurrency, as in traditional currency, it's the system that drives the 'money' (credit).