The truth is that the value of the apple hasn't changed. Neither has the value of the money. A $100 bill is really worth no more than a $10 bill. We simply ASSIGN another value to it. That is just a game that all of us play together, and that 'value' instantly changed if everyone were to decide that a $100 bill was worth another amount . But the money itself is worthless. That is why people are happy to trade it for stuff like toilet paper and paperclips.
Money obtains value only at the moment that you trade it for something which has value.
Therefore, even though economists like to define Inflation as the decrease of the value of money, it is really just the increase of greed.
That has to do with the nature of being rich. Being rich is not about having little or much money, it is about having more than the rest of us.
THAT is the driving force behind inflation. And it is the truth about the value of money.
Money is SUPPOSED to be worthless, otherwise people would never gladly trade it for worthy stuff like clothing and food.
It is a matter of psychology as well.
Suppose you have $1000, and you work to make $100, then you think you did well because your balance increased by 1/10. But the next $100 you earn is an increase of only 1/11, the next $100 is an increase of 1/12 and so forth. This impresses the illusion on people that they need to work ever harder for ever littler gains.