Do you not know how Hive works?
It’s a dPoS system, aka distributed proof of stake, meaning that Hive is like shares in a company. If people vote for your content because they decide it has value, that is them voting for you to be rewarded with what is essentially stake in the platform of Hive. Then since you need to have a certain amount of stake to do things in Hive using the Resource Credits, as opposed to paying for gas in things like ETH, it creates a supply and demand for Hive. This is actually probably an over simplified version, as it’s actually a complex economy of social value, technological resources, and of course speculation from the free market.