It is something difficult to buy at high price and is not sound good as well because you know that if you buy att high price and suddenly and unfortunately the market value become down so it will destroy the overall  money which you have put into it so i will recommended that you always buy the coin when the price is low because there is a hope that it will go up sometime but if you buy at already high price then it will be very difficult for you  to return back to initial condition after failure.