I think the way to sell and buy bitcoin is very easy. you just sell at a high price and buy at a low price. it's very easy to do. do not need any special skills to benefit from bitcoin. if you are good at utilizing the price of fluctuating bitcoin .. then you can take a chance at any time. so you get a profit in the long run and short. but for me bitcoin menhan is more important than you sell it. because the longer you store bitcoin the more profit you get will get bigger .. i'm sure the bitcoin price will be the oldest go up. so buy bitcoin now