the purpose of currencies is to make sure  commodities don't catch the deflationary trend .. I mean if you transacted in assets ( gold or btc) ; the  mass manufactured commodities would soon hit the rock bottom.   Because commodities are the lowest value per unit .. which means no incentive for producing wheat unless it becomes scarece. you don't want people to fight for food ..

Thus comparing assets to currencies ain't a good idea .. we need to strive for better currencies (eg  USD stables) as much as we strive to have sound assets ( eg btc) 

Assets and Currencies are two wheels of a cart .. it is efficient to run economy on two wheels rather than just one ! Sound Currencies protect the poor.   Sound Assets support the rich . Both are necessary .  Keyword here is "sound"  - corruption is possible in both .