Second that!
It would be nice if the world used one currency. No more getting the phone out to work out how much something costs in a foreign currency.
That is a bad idea for forex traders. They will lose a lot of income if that happens. Though it seems to be a good idea at first but I think it is better if there are a lot of cryptocurrencies and fiat currency. So that there will always be a competition and we will always have a choice on what to use.
And having a sole currency will not make an active trading activity.
Since there is no other currency to be exchange of, trading method will now be delisted as one of the possible opportunity and best way to make money online.