Well, there's crypto, there's bored people stuck at home at not going out much with cash to burn, and there's people who've gotten multiple stimulus checks that probably didn't need it, since most people who are that into PC gaming that they can spend 500-1500 dollars on a video card are likely in the remote-eligible worker class and didn't actually lose money in the pandemic.
And there's probably just generally high demand. A ton of people skipped the 20XX cycle entirely.
So yeah, it makes sense that demand would be more than double.