Lots of "considerable risks" including the fact that Ethereum will drop in price due to the DAO. $100s of millions of ETH have been invested in creating DAO tokens. These tokens will be used to fund projects. To fund projects the DAO tokens will be cashed into fiat $ via ETH. This flood of ETH sells will most likely make the ETH price plummet.
In summary the article concludes: "Its a steep mountain to climb with considerable risks and failure more likely than success."