Sometimes I think if becoming Legal Tenders in Countries was even the motive of Satoshi?
You being your own bank is what I always represent Bitcoin/Crypto with.
What are your thoughts?
This is an interesting question.
The ideas of open source software, cryptography, distributed tech, all share some properties. One of them is that they are free to be used by anyone.
In one way your question is like asking "I wonder if being the backbone of the internet was Linus Torvald's goal for his kernel?"
In the end FOSS gets to be what ever the users want it to be and used by whomever chooses to. So Bitcoin is open to use by any tiny individual as well as whole countries. Banks will use it. New "banks" will be built on top of it. In some ways I feel as a use case El Salvador is much closer to the heart of what Bitcoin is than Coinbase. But I believe FOSS allows them both.
The idea that the only legitimate use is a grassroots one (not saying that is your argument) is a bad take in my humble opinion.
The right thing is for the FOSS community that supports Bitcoin do its best to make sure that the grassroots user always continues to have access.