IMO, the failure of monetary system is the Fiat printed by the centralized banks which is why the Rich gets richer and the Poor gets poorer because they are the one who governed or manipulated it just the way they did to Crypto-currency market nowadays! They are just toying the price for their own gains to make them richer and seems they don't care about this decentralized technology! 
That is the point friend. He only proved how desperate he was with that statement. Bitcoin has the potential to end with this slavery system, that's why is a "failure" in his view.