#derivative trade  in gold or bitcoin or cowdung are just  synthetic  electronic trading (just tracking price ticker only )with no delivery agreement or promise of the underlying real asset at settlement.
those newbie starting to learn it means some big bank sell 50000tonne of gold in books or 50million bitcoin at the futures exchange like CME hence real supply LIMIT has no meaning whatsoever in context DERIVATIVE BANKS PROP TRADING  electronic books and they can carry trade losses for  20 to 50 yrs unlike an individual trader who can go belly up financially with few wrong trades. derivative trading platforms never need to hold the real asset at all unlike  SPOT Exchanges or DEX Swap or ON-Chain PEG like Liquid-BTC or Wrapped BTC or HTLC locked like LN