Grant Cardone, a private equity fund manager, money expert and real estate investor, acknowledges that young Americans face numerous challenges — but still believes everyone can achieve financial success. While Cardone said it’s OK to pay for some things with credit, they should only be purchases that will eventually help you make more money, especially when high interest rates are involved. “Letting what you see on social media tempt you into spending money on things you don’t need is a big mistake,” Cardone wrote.