One-third of your wealth should be in securities, one-third should be in real estate, and one-third should be in jewelry and art. So went an investment maxim of the Rothschild family, “arguably the most successful (in a financial sense) in history.” Securities, especially stocks, are the best, both from the buy side and the sell side. Buying securities online in my Bank of America account would be commission-free. I just listed my house for sale at a 5% commission. For commercial real estate, it can be 10%. ...