system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is 2% inflation rate good, and what would happen if the rate falls below this?

Would people notice sudden changes in daily life?
gpt
Inflation means that a dollar gets less valuable over time (by 2% a year). Too much inflation, and money becomes worthless, like in Weimar Germany. The too-little problem is a bit trickier. 

Inflation encourages people and corporations (and especially banks) to do things with their money, specifically, invest it in businesses, education, or something else. If money loses 2% of its value each year, companies have to be doing something with it that earns at least a 2% profit - like lending it out.

Basically, inflation forces banks and billionaires to stop just sitting on money and instead reinvest it, creating new businesses and jobs and driving the economy forwards.