How do I get FEI?

Could you please elaborate on the process of acquiring FEI tokens? I'm interested in learning the various methods available to someone looking to invest in this cryptocurrency. Is it possible to purchase FEI directly through a cryptocurrency exchange, or are there alternative routes to obtaining it? Additionally, are there any specific requirements or limitations that potential investors should be aware of before attempting to acquire FEI? I'm eager to gain a comprehensive understanding of the process.