To summarize -> things that don’t solve problems are shitcoins
I see your point and don't think it is that black and white. As you are mixing crypto, for profit companies controlling social networks and usd currency.
For crypto I am not an expert however don't know about any useful one.
For social networks their purpose is to generate profit as for profit companies and some are more successful then others. They represent single point of failures and one could argue that benefits they provide are not outweighting total cost to the society.
For usd, well it is a currency and since it is not pegged to gold or any hard currency anymore last 50 years represents how that looks like...
Back to zapping ⚡⚡⚡