Yep.

#1 use of sound money is being a store of value.

This comes first. This enables every other use. If money doesn't store value between when you receive it and when you spend it, then it's useless. The better something stores value between those two time periods, the better a candidate it is for being a medium of exchange.

Gold was the best at storing value over time, it didn't lose spending power but it also didn't grow it. Bitcoin's ground breaking store of value aspect is it actually GROWS in value over time, the first asset of it's kind in history.