Bitcoin can be both a stored value and a payment method as well depending on the availability of resources wherein you can see Bitcoin to be used as both. If the availability of merchants allowing or accepting payment transactions to use Bitcoin as a mode of payment, we can gradually state that it is being used as a mode of payment with regards to the nature and purpose the user wanted it to be consumed. But for those who have no availability of resources to use it as a mode of payment they treat it as a stored value wherein they keep on acquiring Bitcoin for the sake of trading and investment and just keep on doing it until such time they have decided to sell for some reasons and transfer it to a currency where they can encash it for spending.
I do agree that it is both. And it depends on the user himself, how he gonna manage his bitcoin.
Some here are earning btc for their everyday expenses so they are likely the ones who are converting their crypto to fiat.
So even if they can't see merchants that are directly accepting btc, they can always convert it to their local fiat.
But for some, who can afford not to touch their btc, they have the option to hold it for long term and so it can be their investments.