And crypto projects that are derivatives on real world assets, like fiat currencies (stablecoins) or stocks (synthetic tokens), have equivalent backing. If the project were to dissolve, there would be assets backing that. Not suggesting this is the case here, but I keep seeing this worrisome trend where people are stuck in the Bitcoin and ICO world from 5 years ago and think nothing has changed and they don't really understand the technical details of how DeFi protocols work today.
In the case where tokens are not backed by anything they are often governance tokens, which are kind of like startup equity. Startups without much IP or real estate are commonly valued at millions of dollars. This is no different in that anyone is a VC investing in e.g. future governance rights.