Bitcoin is a digital assets which is trading in difference cryptocurrency market and the only way to earn high in Bitcoin is to involve in the trading or invest when the price of Bitcoin went down and sell when it is appreciated. In other words you can earn Bitcoin through mining platform but is very low and required work to do enable to earn more.
IMO i dont you're wrong in this but it's not quite right. Even though it can be traded, there are other factors that can make bitcoin profitable for us, namely investment because in any case investment is much friendlier and more profitable to do than trading.
Indeed, your words with trading buying holding and then selling at a high price seem very interesting but the fact is that when we have been in bitcoin for a long time it is not as simple as imagined so don't just get hung up that you can trade and profit once in bitcoin as if it becomes easy because in the end you have to realise that investing and holding for a certain period of time is the best method to date.
Bitcoin can be profitable in different ways of cryptocurrency investment, what I really understand in cryptocurrency and how others accumulate their bitcoin is through buying bitcoin when the price is in a dip and make sure that you have keep it for long time, some people who have almost one thousand bitcoin today they did not acquire now that bitcoin price keep on increasing, so it's better you buy bitcoin and keep for long run and you will make a large profit than someone who trade bitcoin, bitcoin investment people who knows the techniques is people who invest in long run in bitcoin