I think we can see a long term decline, implying the price of silver will either appreciate or depreciate less than the price of gold , in comparison to it at least.
It's probably a good trade to take as a pair, which if you're using , implies you use a 2 to 3 ratio, selling 2 GC contracts and buying 3 SI contracts to enter the trade with reduced margin requirements. (I think there's a new contract for the ratio alone, but not familiar with it). You should size the trade based on risking 1% to 2% max if the price were to go against you coming back to 70.43.
In the case of CFD or FX traders, you could open trades in the XAUUSD and XAGUSD instruments, or using this XAUXAG or XAGXAU contracts if they exist in your platform. If you own physical gold , exchanging it for silver makes sense at this point (if you didn't already).