Hoarding has the goal of delayed buying. Of course, some people can hoard for the sake of hoarding, but most do it to store value for purposes of future consumption. Which again brings us to unique consumption cases that this or that currency can provide.
Storing today's excess for future consumption. That is indeed the reason money emerged in human society in the first place. It later became necessary to pay specific demands (Tax or trade etc)
Cryptocoin buyers so far fall into 2 categories : Those who want to store value for future consumption, and those who want to make a quick profit (preferably getting rich) in a shorter time frame.
The purchases of Cryptos with express intent to use for current expenditure are virtually nil. When Cryptos are demanded as payment for necessities , then mainstream adoption will be underway.