Is it possible to return a value from the database to use in a user profile field?

[JGM007]

So I am at a loss and I am hoping maybe someone can clue me in.

The field output if you make a custom user profile field looks like this when you view the code:

<input type="text" class="bginput" name="userfield[field5]" id="ctb_field5" value="test" size="25" maxlength="100" />

If you set a default value for the field, say $bboptions[username] why would it not return the user name in that field as the default value?