If you will be observant in the coin market , then you can choose the best time to buy or invest in bitcoin, this is when the market index go down or fall down then this is the time to buy or invest in bitcoin, and when the market goes up or rising high then it is the time to sell your coins .
Yeah it is the best time to buy bitcoin as now we can see market of crypto currency is getting high these day for high investment and huge profit, buy and hold your bitcoin as long as possible, if you buy now and hold it then latter on after the pumping price of bitcoin you will be able to sell at higher price than now, so buy now as gradually bitcoin is getting high and being late will make bitcoin really expensive because of high transaction every month.