You don't need to read any books to do contracts. No book is useful. To do contracts with BTC and Ethereum, you only need to be like a gambler, adjust the position by 20 times, 300 yuan liquidation, the next 600 yuan liquidation, the next 1200 yuan liquidation, the next 2400 liquidation, the next 4800 to recover the capital and make 300. I also tried to do Ethereum contracts to go long when it fell 10% or go short when it rose 10%. I prepared five positions and I could win for half a year. I made tens of thousands of yuan with 10,000 yuan. Unfortunately, I couldn't help but open a 100-fold liquidation and lost half of the money. So far, all five positions have not been liquidated. $ETH