Cryptocurrency expert and controversial crypto-celeb Amanda B. Johnson answers the most common altcoin questions: what is digital currency? What\u2019s 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\u2019ll have time to ponder\xa0whether or not you\u2019ve "made it" in America - and what the heck is BillyRock?