In our weekly show, The Crypto Craze, Brad Smith and Tim Stenovec take a look at how the major cryptocurrencies are trading. This week, Twitter's crypto ad ban took effect and the payment processor LitePay shut down, sending prices of Litecoin and Bitcoin down. We're also joined by Paul Vigna, reporter at The Wall Street Journal and author of "The Age of Cryptocurrency," to discuss how the SEC's crypto investigation is affecting the ICO market. The Securities and Exchange Commission is investigating a number of companies behind recent initial coin offerings.