Everyone who has funds is looking for an easy and straightforward way to earn gains. Until recently, most sources of income were reserved only for experienced market participants and investors. For example, if you put your money in a savings account with a Bank of America, you can only earn an annualized yield of 0.01% (and Bank of America will lend your money out at a 10% interest rate!). ）。 Only when you buy money market funds can you get a more reasonable rate of return. But there has alwa...