According to Thorsten Polleit (a Austrian economist) Store of Value is a sub-function of Medium of Exchange.

I would personally agree with that as it makes sense and can also be seen when looking at Bitcoin. It started as a MoE (10k BTC for 2 pizzas and then as the payment method on Darknetmarkets).

So I'd say Monero is very capable of being used as a MoE and a SoV. When you look at the DNMs Monero has taken over. Also if you look at the statistics of CakePay, NanoGPT, ShopinBit, Coincards, OrangeFren, SilentLink and ProxyStore you notice that Monero rivals the combined usage of BTC and LN.