Bitcoin is a digital currency. It is also true that bitcoin works as a real money. The biggest truth is that bitcoin can make anyone rich. Bitcoin is constantly making progress.
This is the reasons of these post. Bitcoin cannot ensure it's investors or users that it can give them a good profit, there is no easy ways nor risk free money as the OP says and Bitcoin is not an exception. Bitcoin is a volatile digital currency so the price is unpredictable and that is a feature of Bitcoin, it's risk is a give away even before you invest on it.