So Communities If you got food you are blessed issue your own money and stop dealing with people who don't benefit you.
If you issue your own money and goverment come to buy with their money you can set your own rate higher so If they don't want then you sell to those who want.
Off course they want becouse everybody need to eat
So you make your own money and your own Community people all live Nice.
So where do you take the utility from when they have to use a community based currency? because in terms of the financial system, they need back-up, recognition, and legal legality so that the value of the public currency is guaranteed, not only for transactions, but to prove the support for this value must also be clear. You won't necessarily create community money if you can't guarantee its value yourself. Moreover, if you live in a country that has recognized fiat then it would be very futile, it would be the same as trying to stage a coup by creating new money and could be considered a violation of misuse of resources..
Op is so funny to even think of creating a currency of his own under a ruling and constitutionally recognized government in which the community of his he might be talking about might be making up just a 1% of the totally country's population. Even as that, a currency represent a country and it's sovereignty as a legally recognized entity Internationally.
So it's just a nonsense theory Op is presenting and no one need to take this into consideration, never except you're all ready to stage a war with the ruling government in the country just as we have in some nations today where a group of insurgent have taking a strong hold of some locations in the country and as such could decide to make use of anything they feel could be a currency for them, but yet that doesn't make it internationally recognized in the global market.