How long does a trade take?
It depends on what kind of trader you are, if you are a day trader a trade will last anything from a few hours to some minutes, if you prefer to trade long term then a trade could last weeks months or even years, there are many people that hold bitcoin since the beginning and have not sold their coins, so that means they have maintained their positions for almost a decade.
As quoted there is no stipulated time period in trade. It completely depends upon the user who have engaged into the trading. In my view long term and short term were the common trading aspects. Beyond this people just buy hold it for a short and looking the progressive growth of other altcoins used to invest on it to make better profiting. This continues through out the day and the end result gives the profit or sometimes if our coin value drops loss will be ours.