Fast food is a trick because it is highly marked up and designed to be addictive moreso than most healthful meals. Yes, there is trickery in fast food and snack foods in general, and if you don't believe that, there's plenty of material on how the food industry and really the
system in general have used the institution of fast food to keep people poor and sick. This isn't to say that everyone in fast food, even those in its upper echelons, are acutely aware of this, but discounting the involvement of conscious thought, it is a manifestation of modernity that developed to trick minds.
> stop trying to prevent people from being scammed, because reasons
No, that's not what I'm saying, at least in your brutal interpretation.
Should society allow anyone to be scammed? My answer to that question is a clear no, especially when it comes to fraud. Society functions orders of magnitude better with a level of self-control than it would otherwise.
Does this mean that society should protect people from themselves? Or rather, if someone believes they are going to get rich putting their life savings into cryptocurrencies because they lack foresight or technical aptitude, should we do what we can to prevent people from being this foolish despite the existing level of trickery that we are willing to tolerate? If people need to be saved from cryptocurrency, then why aren't we saving them from payday loans, or guzzling HFCs in sodas, or wasting time smoking weed, or gambling at casinos? All of those are examples of tricks (yes, they are tricks) designed to extract wealth and lifeforce. Hell, our monetary system itself is a trick. At times we may point them out as evils, but we don't take them so seriously because life can't be so safe. Unless something radically changes in our societies, for all intents and purposes, we are allowing some of us to hang ourselves by our own rope.
Yet somehow crypto bears more fault for some? To me, that doesn't follow. If I create an NFT for my soul, put it up for sale for $1000, and someone actually buys it, are they being scammed? If I fork Bitcoin into a new cryptocurrency, publish a bunch of poppycock about how it will be the next big thing because I got rid of its limits, and I sell those coins and run off with the money, is it of no fault of the customer that they believed such a specious lie?
No and no, in my opinion, because it's not reasonable for society to protect people to such an extent as it would neither be sustainable nor good for every business to be scrutinized to the degree necessary to provide said protection.