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What does the word "general" mean? It means all people, or most people. Now how many percent of the people around the world have smartphones? How many percent of the people around the world doesn't have an access to the internet? I mean the point is the accessibility of Bitcoin around the world is low that only those who have smartphones are the ones who can access it. How can a currency be a general currency if not all people can have access to it?
In reality, the current level of accessibility is still lacking, and uneven for every user. some remote areas of the world still do not enjoy proper internet access, even the supporting infrastructure is still lacking and has not even been built.
This will affect how many users or adopters of Bitcoin because it requires an internet network and of course electrical power to turn on the cellphone or device used.
Another one is the government. Do you think that government will just allow it to happen? No because governments want to use their power to the extent, and that includes even the currencies. IMO, there will always, and always be against this, especially in the government.
Overall, this is still far from happening, and knowing that Bitcoin is still only 13 years in existence, it's too early to think about it TBH.
Of course, the government will not give full space to digital currencies such as Bitcoin to become the main currency for payment.
This is against the government, they must be able to regulate everything while Bitcoin cannot be fully regulated.
Bitcoin is decentralized, no one can change it.
Regulations will be given by each government, different governments will have different regulations.
There are those who strictly prohibit and say bitcoin is illegal and there are those who provide regulations only as commodity assets.
Of course, there will be many obstacles and it is still impossible for Bitcoin to become a common currency in the future.
We must be quite satisfied even though the regulations do not fully support Bitcoin, but at least there are still some gaps for Bitcoin to develop.