question:  What is meant by the invention of currency?
context: New money: Do local currencies actually work? It might never have occurred to many of us that there are other types of exchange that can stand in for ragged bank notes tucked away in pockets, or other objects that can stand in for those notes. In crisis-hit Greece, where the euro can be hard to come by, businesses and citizens have turned to bartering using a points system where goods like pianos, pot and pans can be exchanged for security services or loaned farming equipment. Hoarders woke up to discover the banknotes under their mattresses were suddenly worthless. The pound has been trading at its lowest level since 1985 since the UK voted to leave the European Union and there are fears that it could dip further as Brexit ensues. Timebanks, local exchange trading systems (LETS) and digital inventions like bitcoin can provide alternative ways for people to pay for goods and services when mainstream currencies hit crises. But they will only work if Britons are ready to accept that they have the power to invent their own currency. It's an idea he no longer thinks will work, because the debate, since Brexit, has shifted from the currency issue back to ideas about Scottish independence. Everyone has gathered to decide what a Glasgow Pound might look like at a time when many are asking if local currencies can work at all. So they printed a currency that would have the same value as the pound, but could only be traded in independent Brixton shops, where the shopkeeper would also have to spend it locally. No two local currencies are exactly the same. But the Brixton Pound and other recent schemes follow the example ten years ago of the Totnes Pound, a 'complementary currency': that is, one supplementing the national currency. As fears for financial stability took hold during the recession, complementary currencies grew in popularity. The Bank of England does not consider these forms of currency legal tender, but the notes hold value in the same way as a gift-card from a department store, with the same kind of restrictions about where they can be spent.
output:  The power of the people to determine what has monetary worth
options:  The power of the people to determine what has monetary worth  The creation of new machines to produce the bills and coins  New designs being chosen to better represent the people  The switch to a traditional bartering system