Trading is simple, when the price is low it is time to buy it
and sell when the price is high.
That is a simple way to trade but that is the most risky way to trade because it only depend on the developers as if they will work for their coins then the coin will increase in price while if the developers will not care and will not work to increase the demand of their coin then the trader of that type will lose. The best way is to invest in only legit cons and have to adopt the strategy of short term and long term investment and have to focus on fluctuations and to earn from these ups and downs in fluctuations.
i think this sentence is good for altcoins and specially for such coins which are under develop and need more hard work form the developer, but if we speak about bitcoin i think it do not need any developer now, because bitcoin is now one of the most popular crypto currency of the world and people are joining it continuously. hope very soon majority of the people in all over the world will be starting bitcoin and bitcoin will facilitate them in a better way.