Buying unneeded RAM, at it's highest price in years, for future gaming, doesn't sound like the best plan.
The "very high settings in all games" is a lot more dependent on your CPU and video card. Play a demanding game and leave Window's resource monitor open. You use a whole lot less RAM than you think you use.
Edit: I thought I recognized your username. You were the one asking if you needed to upgrade your 6700k for future gaming. You have the full-blown upgrade itch. Seriously, use your PC for what you do with it. If at some point it is actually unable to do what you need it to, upgrade at that point. There is no such thing as "future-proofing" with PCs.