Actually this is a type of logical trading condition , Most of the times a particular coin get pumps but due to our non understanding and lack of experience we can't buy them before rise in the price , so we need to buy them during rise in the market , but when we bought at 100 satoshi and then if it get down to 80 satoshi then it is a chance to buy more again and if it again get dumped then again we should buy because in this condition we can make earnings ( if market of that coin get rise ).
But I think this is a risky trading or long time trading job in this condition during the down of the price and sudden buy .