Feel free to buy lottery tickets or gamble, just don't let us catch you investing in a startup seed round.
People keep spouting that argument, and I'm utterly unconvinced of its relevance. Namely because you're arguing against the very things that would compel disclosure of the information required to make an informed decision. The other two things you mentioned have that information provided.
We wouldn't want the poor hurting themselves.
Coins represent a better approach, one not walled off to the general public. Coins can represent concepts or goals that live beyond a centralized organization providing documentation. Of course there is vested interest in regulation. Accredited investors love the walled gardens.