<iframe width="580" height="385" src="https://www.youtube.com/embed/I-cpxEmkotM?modestbranding=1" frameborder="0" allowfullscreen></iframe> <br>It's estimated that 400m people around the world hold cryptocurrency, but that only 8M are securing their coins offline. Experts say ... <br><a href="https://www.youtube.com/watch?v=I-cpxEmkotM">source</a>