Soon one of those Bitcoin ETFs will hit wallstreet and that will likely decide the price of bitcoin just like it does gold. Most of these exchanges will disappear since speculation with bitcoin will be much easier using the NYSE and be replaced by localbitcoins-like fixed rate exchanges to obtain the actual coins.
I agree that the COIN EFT will likely cause the price of bitcoin to increase. However I also disagree that the exchanges are bad. If you are in the US, then coinbase is good as it is very simple and easy to use.
You also have a number of other options for trading bitcoin (the currency exchange section on this forum, LBC, selling on cragislist).