What is the value of i raise to 7?

Could you please explain what the mathematical expression "i raised to the power of 7" signifies? I'm trying to understand its numerical value in the context of complex numbers. Could you also elaborate on the steps involved in calculating this, perhaps with an example? Additionally, is there any specific significance or application of this calculation in the fields of cryptocurrency or finance? I'm curious to know how it might be relevant in those areas. Thank you for your assistance.