You can, but many investors are concerned about the stock market as a whole being overpriced. "Bonds are overpriced, Commodities are overpriced, Equities are o

You can, but many investors are concerned about the stock market as a whole being overpriced. "Bonds are overpriced, Commodities are overpriced, Equities are overpriced, and Real Estate is overpriced. When rates go up they will all tank." Of course this is a first world problem. I used to say "Invest in your own human capital" but I took a look at the cost of private schools nowadays, and they're overpriced too. :-)