chapotraphouse

Actually, money-con could be sort of cool. Coins and currency are a very public art form, with deep historical connections, and coin collectors tend to be fairly chill for a group that skews as old rich white guys, eager to share their knowledge and obscure interests.

Their big conventions (i. e. the annual American Numismatic Association shows) will often have neat exhibits (deep dives with explanations into a specific weird currency, or courses in counterfeit detection and grading) or you can gawk at a single coin worth more than any house in your neighbourhood.

In contrast... Bitcoin is all the ugliness and malice of money without either the utility or the art. This would manage to be an event you left stupider than when you arrived.