The entrepreneur and longtime investor on ABC's "Shark Tank" says "money is meant to be spent" — but only in a handful of places.
"One piece of advice people hear all the time, and I just don't believe it, is: 'Diversify, don't put all your eggs in one basket,'" Corcoran, 74, tells CNBC Make It.
"I put all my money in the real estate basket, my brokerage firm, and everything in there went to buying properties."
Corcoran says she's built "a lot of wealth" by investing carefully and watching the market, but not worrying about investing in across different industries.
She specifically recommends the real estate approach for young people looking to invest, even if means asking their families for financial help at first.