Earning passive income is great but it can be tough in the beginning to see how amazing passive income is. Usually your contributions dwarf your passive income at first. This can make it seem like earning passive income isn’t worth while. But if you stick with it then all of a sudden it starts to snowball. After about 3-5 years your passive income will start to equal 1-2 months of regular contributions. This is where things really start to pick up speed!
I have only dabbled in drop-shipping before when I had an eCommerce platform 6 years ago or so. I think it is something that you could do on the side, but you would want to do in depth research on the industry you want to get into before setting up shop. It may be a little less passive up front, but over time you could take your hands off the wheel.

How long does it take for Google to verify your business?

If you put $500,000 into a candy store with the agreement that the owners would pay you a percentage of earnings, that would be considered passive income as long as you do not participate in the operation of the business in any meaningful way other than placing the investment. The IRS states, however, that if you did help manage the company with the owners, your income could be seen as active, because you provided “material participation."
The United States Internal Revenue Service categorizes income as active income, passive income, or portfolio income.[1] It defines passive income as only coming from two sources, or "passive activities": rental activity or "trade or business activities in which you do not materially participate."[2][3] Other financial and government institutions also recognize it as an income obtained as a result of capital growth or in relation to negative gearing. Passive income is usually taxable.

What means passive income?