I think this is time to buy a bitcoin because the bitcoin is falling down the price and if you can buy in a low price im sure you can get a great profit and its nice if you can buy and you hold it in a longterm because we know bitcoin in a coming years will expensive so if you sell in that time you can get more money.if you buy and hold a bitcoin the most important of that is monatoring the price of bitcoin because you know what day you sale if you see the price of bitcoin.