If you wish to get into specialised businesses and make it become really big you need to have the right knowledge and experience for the business you need to start. For the few very effective individuals, it took all their knowledge and skill inside their field to help it become big. There are several specialized businesses out there that can be very lucrative. However remember, these businesses require which you have the necessary understanding and skill. In addition to that they require an incredibly large investment capital first of all.