Think about this, rather than understanding your risks of real estate, lets look at opportunity costs:
1.) Leaving the money in the bank
100% safe, FDIC will cover you, and you'd be earning roughly 0.01% APR - although GS Bank which I use is offering 1.00%
2.) Putting your money in stocks or bonds
Assuming you don't want to spend time looking up and analyzing different companies and various investment grade or junk bonds, and you put the money into an index fund or a mutual fund. You will be making roughly 5-10%/ year and face just as much risk from the market and economy. On bonds, you'll be making maybe 1-5% on short duration investment grade, and maybe 8%+ on high yield junk bonds. You will also leave your capital gains to be taxed which you cannot offset with expenses.
3.) REAL ESTATE
Real estate is more of a business than an investment. You have to manage the inflow and outflow of your investment, the actual property, and you do a lot more work. Your earning potential will vary, but if you are competent and intelligent then you can perform anywhere between 10-50% ROI. If the market goes bust, hey dude, you at least still own a property that can still house someone (even at lower rents). When you want to leave the market, yes you may face residual risk on the value but that comes with being an intelligent investor in the first place!
Also, if you are scared about a housing market downturn, check out my view on that:
https://www.biggerpockets.com/forums/48/topics/430...