You could end up only owning four bitcoins because no other sellers were willing to sell you the final Bitcoin at $10,000.
Let’s say that you place a limit order to buy five bitcoins at $10,000 per coin. You could end up only owning four bitcoins because no other sellers were willing to sell you the final Bitcoin at $10,000. The remaining order for one Bitcoin will stay there until the price hits $10,000 again, and the order will then be fulfilled.