That's true today, but will it remain true when the cryptocurrency bull run ends, we enter a bear market, and mining becomes far less profitable? Not just that,

That's true today, but will it remain true when the cryptocurrency bull run ends, we enter a bear market, and mining becomes far less profitable? Not just that, but the most profitable coin to mine, Ethereum, is on track to move away from Proof-of-Work, so we can expect a lot of second-hand cards to be sold at fire-sale prices in 2022.