Breakdown of performance for that period (in USD terms):
Bitcoin/USD: +80%
S&P 500 Stocks: +30%
Real Estate (REITs): +26%
Gold: +3%
Bonds: +1%
Everything above except bonds. Why? Bonds typically have a high risk/reward ratio almost equivalent to equities, yet the potential rewards are really low. In the event of a company going bankrupt, bondholders do indeed have higher priority than stockholders in getting something back, but this does not really matter if shit hits the fan and all the company's assets are wiped out. Further more, bonds and stocks have a really high correlation historically.