A not unreasonable one though: a large part of why minority shareholdings have actual potential value is because of a dense network of regulation that ensures company executives act in shareholders' interests, respect their property rights and make accurate representations about how the company is performing. So shareholders have an interest in the state enforcing securities law, including how shares may or may not be marketed.

On the other hand, provided wishing wells and ICOs don't claim to be a genuine investment and aren't considered to be equivalent to securities by anyone with any common sense, it's arguably state overreach to stop people chucking their money into them.