Sir I understand and honor your point fully. You believe that if a coin doesnt have a real world use case it will be just short lived hype. But I am of the view that if a coin get success, use cases joins the coin. See BTC for instanace, it has hardly any use case associated with it in the start but as it gets success, there are things getting associated with it.
They are on a different side, Bitcoin with memes/defi altcoins with fully anonymous deflationary features. most of failed project, with unclear road map, all of them who do not have a solid plan, that why they will not provide anything. I understand, some of it get use case after the coin/token is known, like Safemoon, but, in a general context, it can be said, more deflationary coins that don't have a use-case only last a few months, after that they are gone. Because they were only in hype moment, When the team got the profits, it was over. They don't think about future plans. Of course, it's not all like this, but most of it we can see, only lasts for a while during the hype. No-plans, just offered deflationary feature will not give any impact for market and investors.