It seems likely that between 55-60 by some point in 2018. Perhaps even as low as 48 by 2019.
The only way we will hit the 30s if we see another nutzo bubble in the precious metals. In which case you should probably be selling your metals for worthless fiat.
Many metal bugs use the ratio to increase their gold holdings by playing the ratios. If you want more gold in 2020 then buy silver now.