QUOTE(kmarc @ May 21 2017, 11:16 AM)
Yup, we don't really know what happens behind their doors. There were many instances on Polo where investors were unhappy. Off the top of my mind were the following few:
1) Site crashed during bullruns and the price crashes, liquidating all those long positions (or was it shorts? I have no experience with long/shorts

) and making people lose huge amounts of money
2) Coins making a sudden rise a few days before delisting announcement. Once delisting was announce, those coins crashed like crazy.
The thing is, we got no choice. It's either we use these exchanges or not use it at all. I guess the prospect of earning lots of money makes me willing to take this risk. However, I try to minimize my risk by using 2 exchanges but Poloniex remains the best exchange for trading.
dudes, they are called market makers, you are not actually buying the real coin, you bought the derivatives from them, the form that promises you the private keys (asset title), like a futures contract, they probably hold a minimum required coins, but certainly they can sell you way more than they actually own.
Exchange risk are bigger to deal with. The reason the site frozen or unable to login during high volatility is simply they need to hedge their positions to ensure their profit is secured, all market marker profits when you lose. The technology is awesome, but the weakest link here is the broker (aka market maker / buckle shop / middle men / agent). This is the risk nature of non-centralized, non-regulated instruments.
In the end, banks and MNC will certainly benefited from this ETH technology and leverage on technology, the same can't be said for investors who buy coins from these exchanges, once these exchanges pull the plug off, you will be left without the public key. Imaging you are sold a house to stay but without it's title, would you say you truly own the coin you purchased?