CNBC Crypto World features the latest news and daily trading updates from the digital currency markets and provides viewers with a look at what’s ahead with high-profile interviews, explainers, and unique stories from the ever-changing crypto industry. On today’s show, Tim Bray, a software engineer and former vice president at Amazon, speaks to CNBC’s MacKenzie Sigalos about a letter he co-wrote to lawmakers urging them to be more critical of crypto.