In long-distance trade before, the most troublesome thing for businessmen had been the huge amount of money they needed to carry with them. They had often encountered fierce robbers and ended up losing both their lives and money.
Then Buffett Banks appeared, with branches all over the continent. Their ingenious system turned conspicuous coins into a deposit slip. One didn't even need a deposit slip if one was a regular customer. Deposit information was updated in a timely manner and deposits could be drawn directly from any of the branches.
This had completely solved the security issue of huge amounts of money. Although depositors had to pay a service fee, this fee was negligible compared to the high cost of escorting magicians and knights. Merchants loved Buffett Banks because their money was very safe there.
In just a few decades, a banking empire that covered the entire continent and even had several branches on dragon islands emerged.
