Bitcoin never posed any risk to the world's financial stability in the first place. So this report is pretty much completely useless, even though it might be impacting the price of bitcoin in a positive way. What G20 says about bitcoin is completely irrelevant.
Though, I completely agree with buying bitcoin now.
However, you should be prepared to hold onto your coins for at least 3-4 years, because it could take bitcoin that much time to return to a rallying bull market again. That's just how long the cycle usually takes to revert back to bullishness. But the prices you're getting right now below $10k is peanuts in the context of the long term.