加密散财童子

I have seen many KOLs mention rollover trading while popularizing trading knowledge. I researched a lot of material, most of which is very professional, but I want to write clearly about what rollover actually is and how to do it practically from the perspective of someone who is also learning.
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What is rollover? Simply put:
Rollover = Replace the contract that is about to expire with the contract for the next period.
It's like your rental is about to expire; instead of terminating the lease, you renew it for a new period.
But in the contract market, it's not called 'renewal', it's called 'closing the current position and reopening a long-term contract'.

Most people first heard of Ethereum because it can 'issue tokens', 'create NFTs', and 'support smart contracts'.

But I want to talk about it from another perspective —

Ethereum is a programmable trust platform, but you may not really trust it.

What exactly is it?

Ethereum is not a coin; it is more like a combination of a world-class database + settlement platform + application system.

It can be seen as an apple store without a boss, where anyone can develop and deploy smart contracts (like apps), allow users to use them, and settle through ETH.

The market is like a dog. Its disobedience is not its fault; it's because you haven't understood its behavior logic.
I am a dog trainer. In reality, the first lesson in training a dog isn't to teach it to 'sit,' but to teach you how to observe it.
I entered the cryptocurrency space because my family was scammed into a crypto 'seminar.' I started researching the market, trying to understand: why some people act like hunters during volatility while most can only follow the trend and get hit.
The more I study, the more I feel: the behavior logic of the market is essentially like a dog, a collection of emotional, reflexive, and conditioned responses.