I agree there is more money in selling and buying than just holding Bitcoin but there is more risk in it too. Once the selling timing is bad, it will only lead to losses. So basically to be able to take advantage of fluctuation one must have the skill and knowledge. Having knowledge is easier than having skill or understanding the market.
I guess if you understand jualbeli markets bitcoin surely you will know about the losses or profits because if not it will gain a big loss and will miss all that you can before they occur, we recommend that you should know first about the value of seller or purchase bitcoin with so we will get a big advantage, of course. it is indeed more knowledge is required rather than skill, but skill is also necessary because it will reduce your little loss