The grim supply of video cards can be explained. Over the last 3 months Bitcoin has risen from less than $11,000 to over $17,000. Other less well known digital assets are also up substantially. This means Bitcoin is now at a 3 year high.
While there can only ever be a maximum of 21 million bitcoins, because people have lost their private keys or have died without leaving their private key instructions to anybody, the actual amount of available bitcoin in circulation could actually be substantially less.
With under three million more coins to go, it might appear like we are in the final stages of bitcoin mining. This is true but in a limited sense. While it is true that the large majority of bitcoin has already been mined, the timeline is more complicated than that.
Bitcoins have also frequently been targeted with digital thieves. The resulting theft is virtually untraceable as the assets are distributed over thousands of wallets in multiple cycles.
Bitcoin is often seen as a hedge in an investment portfolio. When PayPal hopped onboard, things went downhill fast.
Coin miners often buy thousands of video cards so when limited supplies of new cards are impossible to find it is all due to the coin miners.
Digital coins have been the bane of gamers for years now. Often flagship cards surface on eBay down the road for very low prices. All that is needed is a strong 850W PSU to be able to use one for gaming. The reason for 850W is that some extreme video cards have three 8-pin PCIe connectors.