How much do you think you lose while exchanging currency?
Take a look at our startup at www.fluint.io
Take a look at our startup at www.fluint.io
I've transferred around GBP100K through to NZD over the last 10 months through it with no complaints.
I'm gathering this is more of a matching service for when you come back from overseas with some leftover currency? How big is that market? I'd be surprised if there is enough scale for a PG start-up = growth start-up, but maybe there is for a decent lifestyle business.
A lot of countries still operate on mostly cash (like the aforementioned Japan) so getting by with only a CC isn't too feasible. Then, relying on the ATM will cost you a lot of money over time unless you specifically have a checking account at a bank with no ATM fees.
The problem comes when you want to exchange larger sums of money.
How are you going to make money? The reason for the spread is the costs involved are high at small scale.