In the world, there are many bitcoin trading exchanges but completely unmanaged exchanges and each exchange has its own price. Bitcoin trading history has seen a lot of trouble from the site collapsed due to sudden traffic increase or hacking and stealing large amounts of bitcoin.
So thats mean we should not use any trading exchange anymore?
Definitely NO, it is through exchanges that we can multiply our btc through trading. I think the real answer to your question would be is for ur to manage our money through these exchanges. We are responsible for everything we do and that includes picking the right exchanges.