Investing is like...
investing is like a safe
if you invest in a federal bond, your money is very secure like as where when you put something is a safe, it is also secure.
investing is like a lottery
when you invest in bonds you could make money, or your business you invested in could go out of business, so you lose all the invested money. when you buy a lottery ticket, you could be rich, or go home with less than you came with.