On this week’s Rule Breakers podcast, Motley Fool co-founder David Gardner spices up his usual monthly dip into the mailbag by bringing in some special guests from The Fool offices. Topics range from the philosophical– Is investing just gambling? Is it time to break up Alphabet (NASDAQ: GOOGL) (NASDAQ: GOOG), Facebook (NASDAQ: FB), and Amazon (NASDAQ: AMZN)? — to the practical — How does tax-loss harvesting work? What’s the best Bitcoin broker?