There is a lot of evidence that suggests it is not very safe at all. With a succulent forward dividend yield of more than 15%, it's no surprise that investors are curious about whether to buy shares of Medical Properties Trust, (MPW 16.74%) a business that invests in hospital real estate to rent it out. But as smart investors know, appearances can be deceiving, and often a high yield equates to high risk. So is this stock a safe place to park your cash to get some reliable cash flow in return, or is there s ...