Wonderful write up. There are a lot of potential issues to discuss about at the dinner table, like trump, the national anthem, #Metoo, etc, but these can't compare in fun and reward with Bitcoin. To explain Bitcoin in a definition that even your grandma might understand:

Bitcoin is essentially virtual cash. Unlike the dollar or the euro, it’s not backed by any country’s central bank or government. It can be traded for goods or services over the internet.

Happy Bitcoin giving and Thanksgiving