There really is no specific reason. We just capitalize "I" even though similar words such as "you," "he," and "we," are left lowercase.
No, you do not capitalize the word drama.
do you capitalize roaring twenties
do you capitalize the word protestant
Yes, you always capitalize "Cuban."
Yes you do capitalize Relief Money
no, but you do capitalize mum
No, you do not capitalize the word drama.
You capitalize the first A but not the last a.
Capitalize the first word in a sentence. Capitalize proper nouns, such as the names of people and places. Capitalize the pronoun "I." Capitalize the first word of a quote. Capitalize days of the week, months, and holidays. Capitalize the titles of books, movies, and songs. Capitalize the first, last, and important words in titles.
do you capitalize roaring twenties
do you capitalize the word protestant
You capitalize Huntington
Capitalize challah bread
You would not capitalize it. cotton gin
Yes, you always capitalize "Cuban."
yes, you do capitalize The Black Hills.
Yes you do capitalize Relief Money