the buck bottomed around roughly 1980, 1995(96), and 2010(11), so the buck should bottom again around 2025 or 2026.   so gold should find support from this trend.  

the dollar and gold normally go opposite,  and only go up together as an occasional short term trend.  i would not expect them to go up together as a long term multi year trend.  

the buck and gold would only go up together long term if the world economy completely falls to pieces while the u.s. does really well.  

of course i could be wrong.