The sudden flood of paper money into the economy, on top of the general strike - which meant that no goods were manufactured, so there was more money, chasing fewer goods - combined with a weak economy ruined by the war, all resulted in hyperinflation.
Prices ran out of control - eg a loaf of bread, which cost 250 marks in January 1923 had risen to 200,000 million marks in November 1923. German's currency became worthless.

Some people used money as fuel.
There are lots of almost amusing stories about people's wages and examples of just how fast inflation pushed prices up during the crisis:
But remember:
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