That is what most people failed to understand, without realizing that when money is only coming from one source once anything happens along the line everything is gone. Sometimes I used to wonder why most people normally have since mentality of having only one source of income, more especially this real estate investment. To be honest nothing good as diversifying your assets, because nobody can really predict what would happen at any given time. Because had it been he put some of his money into Bitcoin investment by now he would have something left.
Of course, diversification is good. We don't know in advance what will happen. But diversification is not for everyone. Especially for new investors. If someone enters diversification without knowing how to invest properly, then I think he will lose all his money. So invest first, gain experience, then enter diversification.