[Majromax]

> Counterparty risk asks whether you'll collect on that bet.

You can make those bets on regulated exchanges, thanks to bitcoin-trust ETFs. IBIT is the largset of those, with $74bn assets under management, and it looks like options contracts are available. Correlated bets would also be easily available with companies like Microstrategy.

I think the biggest risk to such a move would be legal, since executing a demonstration 51% attack would plausibly result in a market manipulation investigation.