It really is a fun topic. Once you start delving into it on the internet it's easy to lose hours. There are several well-known cases, here are just a few. I'm glad to hear your son's friend was able to make a good profit! We had over 100 Bitcoin back in 2018 but they were all stolen in the Bitgrail exchange hack. You're welcome, Lizelle. I'm glad it sparked your interest. Thank you and I hope you have a wonderful weekend!