If a jewelry manufacturer wanted to hedge against possible silver price increases, they might want to sell silver futures.
Selling silver futures would allow the jewelry manufacturer to lock in a price for silver and protect against potential price increases. If the price of silver were to increase, the jewelry manufacturer would lose money on their silver purchases, but they would make up for that loss by profiting on their short position in the silver futures market.
On the other hand, buying silver futures would be a speculative position that would benefit from a price increase in silver, but it would not necessarily provide protection against price increases. If the price of silver were to remain stable or decrease, the jewelry manufacturer would lose money on their long position in the silver futures market.