This comment shows what is wrong with people's understanding of futures markets. Commodity futures are not for the supply of commodities. If you need a supply of commodities, cash contracts are your thing.
Futures, specifically, are useful for implicitly borrowing commodities to control inventory levels across time. An airline needs continuous access to jet fuel, so to be safe, they buy more jet fuel than they need in the cash market. But they don't want to pay for owning all this jet fuel, so they simultaneously sell it off in the futures market. Thus, they have created a loan of jet fuel, making sure they have spare fuel available when they need it without outright having to own it.
In order to have a loan, one needs a speculator willing to buy the credit risk. More speculators usually leads to more liquidity and more accurate deals on loans. There's nothing wrong with this at all.
See The Economic Function of Futures Markets by Williams (1986) if you are curious.
Futures, specifically, are useful for implicitly borrowing commodities to control inventory levels across time. An airline needs continuous access to jet fuel, so to be safe, they buy more jet fuel than they need in the cash market. But they don't want to pay for owning all this jet fuel, so they simultaneously sell it off in the futures market. Thus, they have created a loan of jet fuel, making sure they have spare fuel available when they need it without outright having to own it.
In order to have a loan, one needs a speculator willing to buy the credit risk. More speculators usually leads to more liquidity and more accurate deals on loans. There's nothing wrong with this at all.
See The Economic Function of Futures Markets by Williams (1986) if you are curious.