What makes extinct coins valuable?

What makes extinct coins valuable? What causes their extinction, and why is Bit

What makes extinct coins valuable?

What makes extinct coins valuable? What causes their extinction, and why is Bitcoin said to be vulnerable to hacker attacks?

1. Is the combination of blockchain and virtual currency a good thing? 2. Which projects have no technical problems? 3. Some projects have already emerged. 4. It is worth considering whether these projects have open-source code and vulnerabilities, etc. It is recommended that you not pay attention to the development of this area if they do.

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