Grant Cardone is a popular business guru and investor that has built a billion-dollar empire. And much of his advice goes against traditional investing and wealth-building advice. See Next: The No. 1 Key To Wealth, According To Wahei Takeda, the ‘Warren Buffett of Japan’ For You: 9 Downsizing Tips for the Middle Class To Save on Monthly Expenses On his website he gave advice on how the middle class can get rich and gave investing advice that many might think unwise. He said wealthy individuals typically c ...