I think bitcoin will become a global currency only when we make aware everyone from this currency, and in our business we accept only bitcoin and not any other currency .
Awareness isn't quite a big deal. Actually with the current of numbers of bitcoin users it's enough to become this crypto a global currency. But still it isn't considered as a global currency? Because in most of the cases, bitcoin used to get profits. Yes, an investment and that isn't the role of a global currency.