Anyone who does business in multiple countries calculates and pays taxes in different currencies all the time. As a U.S. taxpayer, I have to report my foreign income and capital gains on my U.S. tax return. If I buy an investment property in Europe and sell it five years later, I have to report the capital gain on my U.S. tax return even if both transactions are conducted in euros. I simply document the purchase price and the sale price on my U.S. return based on the euro-dollar exchange rates at the time of purchase and the time of sale.
most online games have a gold to USD exchange rate
maybe we should start reporting how much we make playing various online games
it’s about as valid as reporting digital currency