The steps and attitude changes of US President Joe Biden on the issue of cryptocurrency can be summarized as follows:

1. Initial opposition: On the issue of cryptocurrency, Biden initially took an oppositional stance. This may reflect his traditional ideas or concerns in the field of cryptocurrency.

2. Attitude change: Over time, Biden's attitude towards cryptocurrency began to change. This may be due to his awareness of the importance and influence of cryptocurrency in modern society and economy.

3. Contact with crypto industry insiders: Biden began to actively contact well-known people in the crypto industry, including some industry players he had previously criticized. This shows that he is willing to listen to different views and seek professional guidance on crypto policies.

4. Seeking future guidance: The behavior of the Biden campaign team contacting cryptocurrency experts shows his attention to the future of the crypto community and crypto policies. By communicating with experts in the industry, he hopes to better understand the development trends and challenges of cryptocurrency and provide reference for future policy making.

5. Accept the influence of cryptocurrency: According to sources, Biden's interest in cryptocurrency began about two weeks ago, and he accepted that cryptocurrency is an important factor in the presidential campaign. This shows that he is aware of the important position of cryptocurrency among voters and campaign activities, and may consider incorporating it into his campaign strategy.

In summary, Joe Biden's steps on the issue of cryptocurrency include going from an initial opposition to gradually reaching out to industry professionals, seeking professional guidance, and finally accepting the influence of cryptocurrency in the presidential campaign. These changes indicate that his attitude towards cryptocurrency is undergoing a positive shift, and he may consider cryptocurrency factors when formulating relevant policies in the future.

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