It is an extremely competitive field and it appears you are looking for substantial returns instead of modest success such as just keeping up with inflation. To succeed at getting high returns, a blanket piece of advice is that you have to be more knowledgeable than the vast majority of people investing in a given arena. For example if you are investing in tech startups you would probably need many years of experience and success in analyzing and/or starting tech companies. It is probably best to start with low expectations and gradually build knowledge for over a decade in your market before taking on more aggressive investments. Investing is no more of a road to easy money than any other field.