BHC summed up my point pretty well. The price of gold is absolutely driven by hoarding and people using it as a store of value, but people hoard it and use it as a store of value because they know in the future there will be a demand for gold from various industries. If there was no demand from anyone anywhere for gold, then there would be no point hoarding it as a store of value.

People hoard bitcoin and use it as a store of value because they know they will in the future they will be able to use it to buy goods or services, either directly or indirectly (by selling it for fiat to someone else who will use it to buy goods or services). If there was no one anywhere who would accept bitcoin in exchange for goods or services, then there would be no point hoarding it as a store of value.

Bitcoin has value because it can be used to buy goods or services. If no one could ever use it to buy goods or services (i.e. it failed to function as a currency) then it would be worthless.

Scarcity only makes an already valuable or useful asset more valuable - it does not create value out of nothing. There are trillions of completely unique objects in the world, none of which are valuable in the slightest.