Suppose there is a person who owns 100U
Then put it in the contract account. If he wants to go long 100U worth of Bitcoin, should he use 100 times to open 1U or 1U to open 100 times?
From my perspective, in the case of full position and not moving the remaining funds to other wallets, the difference between the two operations is:
With 1U of 100 times the capital, you still have 99U that can be used for operations in the contract account, for example, if you open 2U of 100 times of Ether,
100U1 times, all your funds are in Bitcoin, so the fund utilization rate is not as good as buying spot directly (you will not be charged a funding rate)

When trading, you should be rational and purposeful.

You trade when you think there will be a reversal at a certain point
1. If the trend does not reverse, it means that you will continue to suffer losses.

1-1. After a certain level of loss, the value will reverse sharply -> This means that the transaction will most likely end at a tie or with a slight profit.
1-2. After the loss, the value consolidated at a low level without any signs of rising -> This means that this transaction will cause funds to stay on the target, or withdraw funds and cause losses.
1.3. After a loss, the value returns directly to zero -> that means the funds disappear directly into the hands of others.