This a list of bitcoin exchanges recommended by me.
https://bitcoin-central.net/ Bitcoin-Central – The European exchange, located in France
https://www.bitstamp.net/ Bitstamp – buy and sell bitcoins, located in Slovenia
https://www.btcchina.com/ BTCchina, located in Shanghai, Cina
https://btc-e.com/ BTC-e, located in Bulgaria
https://www.therocktrading.com The Rock Currency Exchange, located in Italy
You can now invest using BIT, The Bitcoin Investment Trust, a private, open-ended trust that is invested exclusively in bitcoin and derives its value solely from the price of bitcoin. It enables investors to gain exposure to the price movement of bitcoin without the challenges of buying, storing, and safekeeping bitcoins.