At some point in time I guess it will become either one thing or the other. It cannot stay both at the same time. Can it? Is it a healthy usage method to have it as both?
In principle, the high price volatility of Bitcoin and using it as a means of payment are not very compatible. This is one of the reasons because of which Bitcoin and another decentralized cryptocurrency are not so quickly legalized by the states.
Given the conservatism in the development of Bitcoin, its primarily low scalability, most likely it will be used mainly for very large transactions, which contributes to its very high price.