According to a currency converter, the ratio of AED to USD, and the ratio of BTC to USD, the price of Bitcoin in AED should be 97632, but on Kraken, it’s 72227. That means I could sell all of my Bitcoin for GBP, convert to AED for near zero loss with my bank, then buy back 35% more Bitcoin with AED. Seems too good to be true. Why isn’t everyone doing that? What are the gotchas?