It's better to buy through more reputable sites like Amazon (AMZN), says Robert Herjavec of "Shark Tank." He discusses the biggest threat to Black Friday and Cyber Monday. He talks about the importance of cybersecurity and the threat of "digital skimming," and notes how consumers can protect themselves. He then goes over crypto following the FTX fallout. He also gives his opinion on Elon Musk and Twitter. Tune in to find out more about Roberts company Cyderes and the stock market today.