No one will attack PoS coins, it cost nothing to make, it does not have any value, why attack it? Do you ever want to attack bitcoin when it was worth nothing during 2009? Bitcoin's value grows together with the mining cost, however for PoS coins I can not see how its value can grow without its cost growing. And once it has a cost, it will waste energy
This fallacious and the same flawed line of reasoning goldbugs use against bitcoin when they speak of intrinsic value. PoS coins have value because the marketplace dictates so based upon both utility and speculation.
Even if you believe they lack value and hate them they still have value because someone else values it. If someone dumped 100
paycoins2 ponzicoins on me I would gladly take them because it would be worth my time dumping them for fiat or BTC on an exchange.
The reason why PoS tends to be secure is that with most marketplaces a majority of the coins is held by the founders and developers who have a vested financial and emotional stake in the viability of their project and thus are unlikely to attack it. This also leaves PoS/DPoS with some of the same security vulnerabilities as PoW and centralized mining pools where a small group of people can be compromised to attack the network.