to be honest I am not very optimistic. If China, USA and Russia decide against cryptocurrencies they will shut it down in few weeks. Bitcoin can surge down with negative news to 1000-2000$, and all other alts will bleed even more. Best thing nowadays is to escape to fiat and wait for brighter days.
If this happens, Ill eat my dick. Support is looking strong now. Could go a little lower up to $5000-5500 maximum.
We saw a beautiful correction going to mid November levels. Nothing dramatic, just time to accumulate or hold. G20 wont change much the price of cryptos. Its not one of the most important topics for politicians, just a side discussion.