Cryptocurrency expert and controversial crypto-celeb Amanda B. Johnson answers the most common altcoin questions: what is digital currency? What’s a blockchain? Is Bitcoin safe? Why is Bitcoin so volatile? Should I own any cryptocurrency? Can cryptocurrency actually prevent "secret inflation"? Plus, how trading Bitcoin could ruin your mental health and 9 strategies to retire this year so you’ll have time to ponder whether or not you’ve "made it" in America - and what the heck is BillyRock?