Gold keeps trading up to new record high prices. Bitcoin, while struggling to break out above recent record levels above $100,000, continues to find more mainstream adoption. But both the classic market safe-haven and its more risky new crypto rival are doing something other than just move up and to the right on the chart for investors: within some exchange-traded funds, they are also generating income.Investors want exposure to alternative assets that do not move in lockstep with stocks and bonds. That com ...