Today everyone pay attention to two positions:
107000 and 105000,
these two supports,
one is real-time,
one is important support,
when it reaches, you can buy,
you can adjust 200u yourself,
If Bitcoin encounters a rapid spike, you can buy more.
If it reaches the upper positions I mentioned, you can buy more.
For altcoins, do not touch contracts for now.
The timing is not right.