Show only one publish from a loop of 5 posts?

To illustrate I’ve this Question to which I fetch all my WP posts after which use PHP to filter out even additional:

<?php    

$posts = get_posts(array(


    'tax_query' => array(
            array(
                'taxonomy' => 'sort',
                'area'    => 'slug',
                'phrases'    => array( 'marketing campaign' ),
            ),
    
        ),  
    
    'post_type'         => 'publish',
    'posts_per_page'    => 999999999999999999,
    'orderby'               => 'rand',
));

        
if( $posts): ?>
            
            <?php foreach( $posts as $publish ): setup_postdata( $publish ) ?>

// Filter out customers with funds with PHP
<?php
$post_id = get_the_ID();
$advertiser_id = get_post_field( 'post_author', $post_id );
$advertiser_userfunds=get_user_meta( $advertiser_id, 'userfunds' , true );
if ($advertiser_userfunds > 0):?>

//5 posts left within the loop after filtering out customers with funds

<?php endif;?>      



<?php endforeach; ?>
    
 <?php wp_reset_postdata(); ?>

<?php endif; ?>         

So as an example I am left with a loop of 5 posts now.

My query is, is there any strategy to present simply 1 publish?

It may be in a random order, or just displaying first or final publish from the loop?

I do know there is a php code if in_array(). Perhaps I might implement this in some way?

Desperately need assistance.