Any type of transaction that "traditional finance" or the governments behind them don't approve of. Controlled substances, firearms, sex work, gambling, funding politically unpopular movements, etc.
The mindset that can't understand the valid use cases of cryptocurrencies is approximately the same mindset that believes the status quo is acceptable, and that smashing the boot of the State into the necks of private citizens' ability to transact is a moral good.
If world governments and traditional finance were far less oppressive and moralistic about the freedom to transact, then you'd have a solid point. (Although depending on the jurisdiction in question, I'd say money laundering may be a valid use case, as well).
The mindset that can't understand the valid use cases of cryptocurrencies is approximately the same mindset that believes the status quo is acceptable, and that smashing the boot of the State into the necks of private citizens' ability to transact is a moral good.
If world governments and traditional finance were far less oppressive and moralistic about the freedom to transact, then you'd have a solid point. (Although depending on the jurisdiction in question, I'd say money laundering may be a valid use case, as well).