In cryptocurrency, bitcoin is the one suitable for a long term investment, and many people now are still buying this coin even it takes a long time before they will get their profit. As a trader, we must keep updated what is happening in the market to be aware when is the right time to buy and sell our coin. One of the excellent trading technique is to buy bitcoin when the price is low. From the previous year, the bitcoin price goes up for over 14 thousand dollars, and it is enormous in the middle of the month of 2019, but before the year ends, the cost of the bitcoin slowly going down. Then this is the excellent opportunity for investment.