For instance, no one really uses it to buy things because it does not really function as a currency?
Gold is a poor medium of exchange, too, but that has not prevented it from being a satisfactory store of value.
(Yes, I know that gold actually was a common medium of exchange at one time; it was displaced centuries ago by the greater convenience of paper money.)
Some visionary types hoped Bitcoin would disrupt government-issued (paper) money and governments and banks generally. The fact that these hopes were dashed does not mean Bitcoin will not remain an OK place to park money.
Most people would not want their asset prices to swing like Bitcoin's value does.