I accidentaly left money in my checked baggage flying from Germany to Brazil. It is something like 400 Euro. I realized this only as I was already flying. How often is the baggage X ray scanned? Is there a chance it will be OK?
Most people working in airports are honest, will not steal.
So there is a very good chance that the money will come through, even when the case is checked by X-ray or by hand.
Even more likely as the most likely location for checking by X-ray is in Germany. And German border control and security forces are not known for stealing.
I would not put money in checked baggage on purpose but as your baggage is on its way and you can not do anything about it you can better keep your mind on what you can influence.