You're comparing want (saving) and utility (spending). They're contradictory. They have different purposes. A functioning money system needs to have:
(1) A Store of Value
(2) A Medium of Exchange
(3) A Unit of Account.
Bitcoin is mostly a Store of Value. It doesn't have the other 2 functions. We can try to fit all 3 into Bitcoin. The Gold Standard failed to do it. The US Dollar system is failing. Bitcoin will likely fail to do it.