before start invest. i think i can hold all year to get money anyway. but when i see the chart. when i see a red i'm afraid and sell all my coin 
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)This is the problem faced by all traders and investors who watch the price movement of btc daily, as market is highly fluctuating and it will always tempt to trade in market. So if you are investor then fix the time frame or target price and when it achieves just sell.