An important fundamental of investing and financial security is diversification. Spreading your money among different types of assets such as stocks, bonds, real estate, and collectables means you’re balancing risk and reward. Over time, this approach is much more likely to grow compared to investing in just one asset class. In my experience, the same thing is true about a career. Having a diversified set of income streams is likely to be better over time than working for one company and one industry.