Trading is simple and the best. Buy low, wait... and then sell high or just hold long term for investment purposes.
Yes as simple as that, the value of coins get lower so it is the chance to buy some. And when the price of coin starts to grow higher, it is the time to sell it. But if you are patient, hold it until it becomes unexpectedly high.
quite good technique, but now you can see the price of bitcoin, it's a madness if you decide to buy altcoin for now, i think it takes long time for altcoin to fight against bitcoin price. it will get long time to wait for altcoin to wake up from the slumber. but all is in your hand, keep holding tight.