Very good, I finally see a very good topic. The essence of contracts is gambling. Regarding this statement, I will start to express my views. I assume I take my total capital of 10,000, and I go long on BTC and ETH with a two-times contract. May I ask what my actual position value is? Without thinking, it must be close to 20,000. I use my 10,000 capital to open a position worth 20,000; isn't this the same as taking money from the bank with collateral? Whether you do business or anything else, if your principal is insufficient, you have to borrow, right? Some loans require collateral, so it all becomes gambling. The tools are used by people; some use knives to cut vegetables, while others use knives to harm people. You can't just say that knives are bad, right? So, is the contract good or bad, and who decides that? Another very good aspect of contracts is isolated margin. My friend knows that I like to use isolated margin, why? I'm afraid of extreme market conditions where prices drop suddenly. If you have a regular stop-loss order, you won't be able to close your position in time, resulting in huge losses. As for spot trading, it’s even worse; you end up being stuck all the way down. If you bought BTC or ETH, that would be fine, but if you bought other altcoins, then good luck; you could be stuck holding them for years or even over a decade. So, the way I manage my actual positions, my trading buddies should know, right? The projects I participate in are almost always on isolated margin; sometimes I forget to change it. In this case, my actual position amount is only around 1,000, which means even if I put all 1,000 as margin, it still has to go to zero to be removed. This is no different from holding spot; I just lose a bit on daily funding fees, which is negligible. I believe it has no fatal impact. Thank you all.
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