Hope G20 members will depend the talks on the technology, not on the biased financial experts. But I don’t think the July deadline will be followed. Regulating bitcoin guidelines can take more years of studies and even they can give documents, it will be just drafts and incomplete. I’m still waiting for a better acceptance from other country and regulation only limited to exchanges, businesses using cryptocurrency, not in every individual investors.
Why regulate individual investors? You are already governed by the tax laws. Now it is enough to create conditions under which you can cash cryptocurrencies only through regulated exchanges, and banks will transfer data in the conclusions to your card to the tax authorities. It's not hard to do. I guess the question left to settle is only the tax rate.
Unfortunately my government still not agree with bitcoin although let say one day G-20 declare to permit bitcoin usage.
But If I think for global purpose, bitcoin has many benefit that usually being need on digital transaction nowadays.
About how much the tax will be apply , I think there will be much controversy for discussing it !