A former Central banker in South African Reserve Bank Eugene Etsebeth, he remarkably preside the virtual currency and handout a record in working group.

G7 Central Bank is inactive traders behind the closed doors, they trade that bought and sale same foreign currency, SDR special drawing rights, marketable securities, and gold day in and day out.

As for now, G7 is only concern in the "appropriate regulations" of cryptocurrency (which they participated in their meeting in Germany) and not in the benefits potential of cryptocurrency. Either the Bitcoin, etherium, zcash is cannot be found in their list of tradable currencies that Central Bank is allowed to trade. Although, in 2018 things will have changes, Central Bank Will now start collecting and buying cryptocurrency to strengthen their foreign reserved.

Why they chose 2018? This will be the G7s Central bank action when the Bitcoin market cap exceeds the value of SDR where they have design and distributed to members.

Another thing is that cryptocurrency is devaluing the G7 currencies and that's the fact they are facing. So SDR and G7s country currencies will be forced to revise their foreign reserved and include cryptocurrency in the basket.

In the year to come central bank will be the eyewitness of Bitcoin and other cryptocurrency to become the new International currency in market cap. And so are cryptocurrency will fulfill new essential as digital gold.

Full details in here:
https://www.coindesk.com/2018-year-central-banks-begin-buying-cryptocurrency/