I'd say a link stored in a network that is decentralized and independent of one central entity has more inherent value than a record of money in a bank. Link rot is a thing, but so is the Web Archive and its alternatives. It's just that there have to be people who value that record in the same way they value money, but that's not how it is. Nevertheless, it's something compared to having absolutely nothing after Valve shuts down. You'd still get to show people the records and say "I had that", as worthless as it may become by then.

Edit: And to elaborate even further, I remember a Steam event when being the first to obtain a profile badge, which was indicated by its timestamp, was considered valuable and allowed people to join a special invite-only group. Their badge wasn't even visually unique in any way, but it allowed them to brag and feel a bit more special. They'd get to say "I was there at that time and I did that", and the badge as their evidence would be independent of any screenshots that could be doctored. NFTs are like that, but more persistent.