I would like to ask you, when speculating in foreign exchange and gold, how much will it cost to cause circulation obstacles? /kloc-below 0/0 million, futures cannot be speculated. I am always made by bankers. ... Take foreign exchange as an example. If you are a regular market maker (especially a big bank, not an unnamed online institution), then when your capital reaches about 1 billion dollars, it will easily cause obstacles to the circulation of market makers (which will make prices soar instantly). Gold is hard to say, because the plate is more complicated.