Just the other day someone posted about the GSR having come down and suggesting a significant decline but nothing too dramatic. I commented to that post that historically it used to be 15-20 and I thought that it could eventually get close to that again. Just read this post on Seeking Alpha that also suggests that, but he goes on to explain how silver was removed from being used as money and how and why it could come back into that role again.  A bit long but well worth the read especially if you follow the GSR.   

https://seekingalpha.com/article/4361101-yes-gold-silver-ratio-return-to-15-1?utm_source=feed_articles_macro_view_all&utm_medium=referral