What is the 13 letter of Alpha?
Could you please clarify the question? Are you asking about the 13th letter of the Greek alphabet, which is commonly referred to as the "Alpha" in the context of mathematics and finance, particularly in relation to cryptocurrency? If so, the 13th letter of the Greek alphabet is "Mu" (Μ). However, if you are referring to something else specifically related to cryptocurrency or finance, I'd be happy to provide a more detailed answer based on the specific context you have in mind.