Most of us have been told by our parents that it never pays to walk on the wrong side of the law. Crime never pays. This is a saying we have heard millions of times, threatening us that we should always be law-abiding citizens of the world. But if you look at the net worth and the lavish lifestyles of some of the crime bosses and the gang leaders, you will probably get to thinking whether all of this is actually true. It is true that most of them spent their lives hiding from the law. It is also probably true that their end was probably a violent one. But it is also true that all of them spent a life of luxury in huge mansions while owning properties, airplanes, and everything that a successful businessman may be enjoying. In case you are not convinced, here is a list of the 10 richest gangsters the world has ever seen. You will be surprised to know about the kind of life they actually lived.