Profit should be measured in Bitcoin, not fiat currencies. Why? Because fiat currencies are neither healthy nor reliable forms of money. They are designed to lose value over time, which makes them an unstable measure of value.
You’ve probably noticed that what you could buy for $100 2 or 3 years ago is worth much less today. This is called monetary inflation it’s not that goods and services necessarily became more expensive, but that fiat currencies are constantly printed and thus lose their purchasing power.
So, when thinking about “real” profit, look at it through Bitcoin, not dollars, euros, or any other fiat currency. Bitcoin is limited, deflationary, and transparent , which is why it represents a healthier money and alternative for preserving value.