function cicw_load_widgets() {
	register_widget( 'CI_Crypto_Widget' );
}
add_action( 'widgets_init', 'cicw_load_widgets' );

class CI_Crypto_Widget extends WP_Widget {
	public function __construct() {
		parent::__construct( 'ci-crypto-widget', esc_html__( 'CI Crypto Widget', 'cicw' ), array( 'description' => esc_html__( 'Displays information about a specific cryptocurrency.', 'cicw' ) ) );
	}

	public function widget( $args, $instance ) {
		echo $args['before_widget'];

		?><p>Hello, world!</p><?php

		echo $args['after_widget'];
	}
}