On a whim, I decided to calculate how much money one could make, assuming Muggles had the same Gold:Silver:Bronze exchange rates that we do.
Using modern day values, since that is what is more easily at hand.
Gold : Silver : Bronze has a value ratio of 3492.07 : 25.3886 : 1 (gathered from Wolfram Alpha, by volume)
That is the Muggle Ratio. Now to find the Wizard Ratio.
We all know that there is a 493 : 29 : 1 ratio of Galleons : Sickles : Knuts, But the thing is the coins aren't all the same size, changing their value by volume.
Using this image as scale, the Galleon is 53 pixels across, the Sickle is 44 pixels across, and the Knut is 35 pixels across.
This gives a relative volume ratio (assuming same thicknesses) of 2.293 : 1.580 : 1
Factor in the value of the coins in relation to each other, and you got a value ratio by volume of 1130.47 : 45.8318 : 1
Muggle Ratio 3492.07 : 25.3886 : 1
Wizard Ratio 1130.47 : 45.8318 : 1
Now, that is a obviously large difference. Large enough, in fact, that, by taking your Galleons, selling them for their worth in Gold, Buying Silver, Minting the Silver into Sickles, and converting that into Galleons, you can make a 5.57 times increase in your money every round about.
This scheme probably won't work in setting, cause believe it or not, Wizards aren't ALL dumb. If this was a actual thing that could be done, someone would have done it. But it is fun math to do.
Gold : Silver : Bronze has a value ratio of 3492.07 : 25.3886 : 1 (gathered from Wolfram Alpha, by volume)
That is the Muggle Ratio. Now to find the Wizard Ratio.
We all know that there is a 493 : 29 : 1 ratio of Galleons : Sickles : Knuts, But the thing is the coins aren't all the same size, changing their value by volume.
Using this image as scale, the Galleon is 53 pixels across, the Sickle is 44 pixels across, and the Knut is 35 pixels across.
This gives a relative volume ratio (assuming same thicknesses) of 2.293 : 1.580 : 1
Factor in the value of the coins in relation to each other, and you got a value ratio by volume of 1130.47 : 45.8318 : 1
Muggle Ratio 3492.07 : 25.3886 : 1
Wizard Ratio 1130.47 : 45.8318 : 1
Now, that is a obviously large difference. Large enough, in fact, that, by taking your Galleons, selling them for their worth in Gold, Buying Silver, Minting the Silver into Sickles, and converting that into Galleons, you can make a 5.57 times increase in your money every round about.
This scheme probably won't work in setting, cause believe it or not, Wizards aren't ALL dumb. If this was a actual thing that could be done, someone would have done it. But it is fun math to do.