<prompt> Human: Does anyone have some guidance on how to invest as a career?I think that when most of the people here think about investing, they think about building a nest egg so they can retire comfortably in their old age. Usually this entails working a normal job and saving some portion of every paycheck to put into a 401k retirement plan or similar investment vehicle.But how do you do investing as a business? Im not talking about making money by becoming a stock broker. I mean taking some of your own money, say a few thousand, starting a holding company, and buying your own stock picks. I assume youd sell those stocks once an acceptable profit has been made and then continue to purchase more stocks that you expect to generate higher than average returns. Though it may take 10 years or more to achieve an acceptable rate of return. So how do you generate enough money to maintain your basic living expenses till then?TLDR: If you were going to start a holding company like Berkshire Hathaway from scratch, how would you do it?  <response>: The reason Berkshire Hathaway is successful is that they identify good companies with even better managers, buy stakes in them, and hold onto them forever. Rather than paying dividends, they amass surplus cash and use it to buy other companies with talented managers.So its not about making money, selling off your position, and then starting over. If you were to do that, youd be one bad bet away from insolvency. Also, you dont invest as a career by spending your money. You do it by investing other peoples money. 