Feel free to try and attack a PoS chain and let me know how successful you are.
That happens all the time. PoS coins have to use (increasingly convoluted) checkpoint schemes to fight 'nothing-at-stake' type attacks.
NovaCoin, for example, just got #rekt by one. And Balthazar is 100 times smarter and better at coding than Dash's trash developer.
It would be such a terrible tragedy if Dash suffered catastrophic consensus failure about an hour before Madoffield's Miami talk starts...
