I'd be okay with that. However, depending on what you mean by "Bitcoin the currency", my view is it's either impossible or inevitable. That is, native onchain Bitcoin widely used as currency will be impossible (it won't scale); but, some derivative of Bitcoin the asset being widely used as currency is inevitable (once merchants widely recognize it as the superior money that it is).
Discussion
Bitcoin the currency is extremely easy to define.
"I can use Bitcoin to pay for a pint of milk or a house everywhere, with equal ease."
I now think of Bitcoin Layer 1 as the bank RTGS system.
I think of Layer 2's and Sidechains as a commercial world of Bitcoin merchant services, including a free tier for those wishing to be self sovereign.
Good definition. That falls into my 'inevitable' category, then.