In bitcoin transactions, people may only think of buying coins, and then throw them away when the coins rise. Basically, it is the same as stock operation, using the price difference to make money. With the passage of time, bitcoin transactions have been escalating, and since then there have been current contract transactions. The principle of contract trading is the same as futures trading. Two-way trading can be long or short. Before the transaction, digital currency and other matters shall be submitted and agreed by both parties, and then the transaction shall be conducted at the agreed time. No matter when the trading time is up, whether digital currency has gone up or down, and whether the result is profit or loss, it must be traded according to the previous agreement. For example, I think bitcoin is on the rise in a short time and needs to do more operations. At this time, I only need to pay a certain margin to the platform and add 50 times leverage, so I can make full use of the funds until the price rises. Then sell it, deduct the handling fee generated by the transaction, and the rest is earned; In the same way, the same is true for short selling. To play 58coin bitcoin contracts, you need to understand the logic of contract transactions and learn some basic skills, such as simply looking at K-line charts and moving averages. And then correct our trading mentality.