I guess what exactly do you define as scamming? In terms of outright fraud, I agree there's a lot. It shouldn't be super surprising that scammers tend to prefer decentralized permissionless financial rails, for the same reason that political extremists and pornographers were some of the biggest earliest users of the decentralized permissionless publishing rails of the early Internet.

But I wouldn't characterize all, or even most of crypto as scams. Gambling, maybe. Are memecoins a scam? I would say they're more like a massively multiplayer form of gambling. Which you might argue is a bad thing, and certainly is dubious from a social standpoint. But if the code is openly public and autonomous, and there's no outright deceit, I don't think gambling is really gambling.

Even beyond that, there's a lot happening in crypto that most certainly isn't scams. You have stablecoins and payment rails like USDC, stores of value like Bitcoin, smart contract chains like Ethereum, decentralized finance applications like permissionless exchanges and lending markets, social applications like farcaster, decentralized AI, and gaming.

Now you might argue that all of these things are stupid and pointless and wastes of money, but that's a separate debate. Of the large projects in these categories almost none are outright scams. They're teams experimenting with new ways to run financial markets or move payments or train models or hedge inflation. Like most technological experiments most will fail. But if that was the criteria for "scam" then the entire startup sector is also wall-to-wall scams.