The potential really depends on how it's being made and what's the purpose of it. And the risk also differs when the altcoin has already been established. The lesser risk are the ones that have been in the market for so long but that doesn't mean that the longer the projects are, they're unlikely to scam. There were projects in the past that have became scam despite that they've been known already in the market. One example of it are the Do Kwon projects, the terra projects, LUNA and UST.