By next year most major countries will ban cash.
And I wonder what they'll use instead? (...) I think a global battle will ensue for which coin will be the one global currency.
You can rest assured cash is not going to be replaced by any cryptocurrency.
Going cashless is all about
increasing the influence of central banks. And it makes sense: why pay with cash if one can pay via card or phone...
Keep in mind that the world's financial system doesn't really have any place for Bitcoin or any of its alternatives at all. It's a tiny little drop of "alternative culture" in a vast ocean of power. What we'll definitely see is a big(ger) international role of the Renminbi...