One of the things I'm surprised your article doesn't mention is the tax advantages of this type of investment. The depreciation and rehab costs (purchasing distressed properties) can be huge deductions to ones income taxes, which none of the others have. Then, along with the appreciation of real estate, this passive income investment outperforms the notion of maxing out my 401k as well.
More cheerleader rah rah programmed nonsense. Again, no statistical evidence to prove this is true, no statistical evidence to prove the “education” from MLM has any value whatsoever (spoiler alert it has no value as it is just brainwashing propaganda), and it has been repeatedly found that your effort in MLM does not reflect your level of success as it is a near mathematical certainty that you will fail.
This is a venture that is growing rapidly. You can create videos in just about any area that you like — music, tutorials, opinions, comedy, movie reviews — anything you want . . . then put them on YouTube. You can then attach Google AdSense to the videos, which will overlay your videos with automatic ads. When viewers click on those ads, you will earn money from AdSense.
If you're looking to get started in real estate, look at a crowd funding solution like RealtyMogul. It works similar to LendingClub - you commit as little as $5,000 towards a property. When the property is fully funded, you become an owner, and will receive your share of the earnings and appreciation in the property.  Check out RealtyMogul to learn more. 
I rent out two single family homes. You need to learn about how to analyze your return on investment, get the places rented, and deal with repairs, problem tenants, among other things. If you don’t do your research, you could easily lose money. I have to spend a few days a year managing things, checking up on the properties, finding new tenants, but it is effectively passive. I buy in areas near big universities with stable real estate markets so there is always a fresh crop of new people moving into the neighborhood.
Speaking from our own experience, you can’t be a passive McDonald’s franchisee. Every McDonald’s potential franchisee will need to complete at least thousands of hours of training before he/she would be approved to acquire a franchise and only if he/she has the financial resources to acquire a franchise. It could take years before one would get a single store franchise. Until the franchisee eventually has acquired multiple stores and established his/her own management team, the franchisee would have to put his/her nose to the grindstone and work his/her ass off every day. I won’t call it a passive investment by any stretch of imagination.

Investing in coins and collectibles: Buffalo nickels and Spiderman comic books are good examples of coins and collectibles that can rise in value, and thus offer opportunity for passive income investors. You'll need to get up to speed on the value of any coin or collectible under consideration, but once you do so, you're on the way to price appreciation on a commodity you'll be paying a lower price to buy, and will garner a higher price when you sell.
The idea of long term residual income is a powerful one.  Who does not want to do work once and reap the benefits for years to come. The sad reality is this idea is used to convince people to join a business opportunity that can’t provide long term residual income. Don’t waste 3-5 years of your life for something that you will not find in a MLM scam.
The first form of residual income, the leftover cash after bills and expenses are paid, is important when a person is growing their savings account or is seeking a loan or financing. When getting a loan, there must be an adequate amount of residual income available to ensure a person has the money to make the loan payments each month. If there is not adequate residual income, financing or loans will not likely be approved.

You may not think of driving for Uber as a “passive” income strategy, and in many cases, it’s not. What you may not know, however, is that Uber has a feature called “Going my Way” that allows drivers to specify where they are headed and pick up passengers along the way. So why not sign up as an Uber driver and start getting paid for driving where you were already headed anyway?
The more residual income you can build, the better off you’ll be. In fact, it’s said that the average millionaire has 7 different streams of income. By creating passive income streams that generate money while you sleep, you’ll build wealth faster and diversify the ways you’re able to make money – which helps protect you from the loss of any one individual income stream.
There are many people who get paid vast amounts of money to become the CEO of a company, play professional sports, or star in a movie. Earning a high active income is often a lot of hard work and requires a dedication beyond most of us. It’s also limited because no matter how much money you get paid you still need to show up to work to earn your money.
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