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I would like a briefly explanation for each question: 1-What are the roles of money? Desirable features? 2-What are the problems with centralized financial systems?

I would like a briefly explanation for each question:

1-What are the roles of money? Desirable features?

2-What are the problems with centralized financial systems?

3-What are the potential advantages of decentralized ones?

4-Why did Bitcoin precursors fail?

5-What are the main properties of Hash functions?

6-What is the structure of a block?

7-What are the roles of the block components?

8-What are the rules in the PoW verification game?

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