As interest rates have been going down over the past 30 years, bond prices have continued to go up. With the 10-year yield (risk free rate) at roughly 2.55%, and the Fed Funds rate at 1.5% (two more 0.25% hikes are expected in 2018), it’s hard to see interest rates declining much further. That said, long term interest rates can stay low for a long time. Just look at Japanese interest rates, which are negative (inflation is higher than nominal interest rate).
As a millennial in my mid-20’s, i’m only just starting out on my journey (to what hopefully will be at least 5 streams of income one day) and i’m trying to save all that I can to then make my money work harder and invest. It’s difficult though because a lot of people say you should be saving for retirement and have an emergency fund (which is so true) but then on the other hand, we are told to take risks and invest our money (usually in the stock market or real estate). And as a millennial it’s so hard to do both of these things sometimes.
For a person working for a wage, their source of income is their job, or their labor (aka their time that they sell to someone). But you can own a house, and rent it out, and when your renters pay you renter every month, the source of that income check is your rental property, or your house. It would just be called rental income. If you have money in the bank in an account that pays interest, those interest payments are another source of income. We can say the source is interest payments, or we can identify the asset that is generating rent, and say your money in the bank that is generating “rent” (aka interest) is your source of income.