If bitcoin has a high price and is expected to fall, if we estimate bitcoin prices will rise again then I suggest do not sell first because it could be bitcoin price will be more expensive. But indeed to sell bitcoin that much risk we will get ...
I also agree on not to sell. The situation of the market is very important and its shift are very necessary to study before making any decision of buying or selling. Talking about today, bitcoin is the only crypto currency who has won the confidence and trust of major investors of the world. People around different parts of the world are really investing their capital and even their savings in the bitcoin and its because of its high demand it is very likely that its value will go high, so right now its not recommended to sell.