From what I have read they just made up it to conclusion that they are holding of any new regulations for cryptocurrecencies as it is not yet hurting any financial situation of a country. People have assumed that this news coming from the G20 is the reason of the sudden rise of Bitcoin's price. When they are forgetting that we are still on a down trend and 8,500$ is just a resistance under the EMA 50 moving average. The 14% price increase might still end up a bull trap as the volume is lagging.