The coin read 250 B.C.
So, it was
249 BC years old.
Because, it was made in 250 BC.
So, it would be 1 year old in 249 BC, 2 yr old in 248 BC .... 249 yrs old in 1 BC.
Now, out of 249 years, for 248 years he would be given $100/year. And for the rest 1 year, $10,000.
Am I wrong ??