The price of bitcoins is dropping now and it may drop even lower in coming days so I will wait for a while and see how price behaves in coming days and if it goes below $7k then that would be the best time and best price to buy bitcoins and hold it till the end of the year as majority of people are predicting that it will once again achieve $20k price in this year so that would be the perfect time to sell bitcoins and collect the profits.