Why is iota imaginary?

Could you please elaborate on the statement "Why is iota imaginary?"? I'm curious to understand the basis for this assertion. Is it due to some specific characteristics of iota that make it unlike other cryptocurrencies? Or is it a reflection of some theoretical or philosophical viewpoint? Additionally, how does this imaginary nature of iota impact its practical use and applications within the realm of finance and cryptography? I'm keen to gain a deeper understanding of this concept and how it fits into the broader landscape of cryptocurrency.