Should all pronouns be capitalized

The pronoun 'you' is capitalized only when it is the first Word in a sentence (the first Word in a sentence is always capitalized). The pronoun 'you' is the person being spoken to; 'you' is taking the place of the name of the person spoken to. When you speak to someone, you normally start the sentence with their name or the pronoun 'you'; for example:

John, wash the dishes.

Or:

You wash the dishes.

You may then go to the movie.

Or:

After you wash the dishes, you may go to the movie.

Capitalizing the Word 'you' depends on where it falls in the sentence.