Excellent answer @maventiger tiger , "Invest in various rights packages to help secure your investment" By making various investments in properties, whether to sell or rent, you ensure profit in some way. Exactly that is to expand the real estate portfolio, Increase investment.Expanding your portfolio or portfolio diversification is a very important and common among real estate investors. Portfolio diversification as you may know is to help share your investment in such a way that you invest in various bundles of rights to help secure your investment. Should in case one or more investment aren't yielding profit others would make up the gap.