401(k)s are too risky for retirement

I actually considered this a few weeks ago, but at the end of the day, you have to put money away in some kind of savings vehicle like a 401(k) (I know- I'm preaching to the choir).

My wife just sold 1 of her 3 businesses and we have been looking to use the profits from the sale to buy commercial property for 1 business instead of paying ungodly rent. So we haven't put anything away into 401(k) yet and I started wondering if we should abandon them all together and look for alternative investments, like businesses and commercial property.

I think we just need more diversity in our investments, so that (in theory) one thing is always appreciating in value and generating future income (property, stocks, etc) and hopefully, all of them appreciate together in the long run.