Maybe worth to buy it but always not invest a lot on anything because if there something happen you can be sorry and lose a lot of money, and is hard to know if can get a good profit.
that's the risk of investing with big results so there will also be a big risk too, investing with minimal and legal risks is also available but cannot use small capital.
in order to minimize your risks, you need to concentrate all your investments in many projects that will bring you income in parts. If one project or two projects lose, then you will benefit from the rest.