Some parts feel over-engineered, do you really need the most current rates, it's not like many currencies fluctuate wildly, unless you want to show crypto value

Some parts feel over-engineered, do you really need the most current rates, it's not like many currencies fluctuate wildly, unless you want to show crypto values. And people dealing with currencies know between them reading the info and the time they need to pay, the number might be different. Also their bank might have a different rate. So it seems like it's precision when a ~2% imprecision is good enough. And needing to mouse-over all the numbers would annoy me quickly. Here's the peanut gallery suggestion: just like many sites have a language dropdown, add a dropdown to select the secondary currenc(ies), and all monetary values would then be displayed as e.g. "€175 (£150.05, $182.02)"