I think it's about the sacrifices in one's personal life and happiness that are made in order to chase fame, wealth, and major success. Kanye is looking back on his life, and while he achieved great success and accomplished many of his goals, he still regrets the price he had to pay and questions if it was really all worth it. It is presented as a warning to young rappers (personified by Cudi) or anyone else chasing greatness. Kid Cudi still possesses the fire and drive to be successful, which reminds Kanye of himself ("I've seen it before") and Kanye is warning Cudi that the lifestyle is not that great. Ultimately, though, Kanye never takes his own advice and can't stop pursuing success. In the last verse of the song, Kanye sings Cudi's chorus, showing that just like Cudi or a younger Kanye, he is still consumed with chasing greatness.
I think it's about the sacrifices in one's personal life and happiness that are made in order to chase fame, wealth, and major success. Kanye is looking back on his life, and while he achieved great success and accomplished many of his goals, he still regrets the price he had to pay and questions if it was really all worth it. It is presented as a warning to young rappers (personified by Cudi) or anyone else chasing greatness. Kid Cudi still possesses the fire and drive to be successful, which reminds Kanye of himself ("I've seen it before") and Kanye is warning Cudi that the lifestyle is not that great. Ultimately, though, Kanye never takes his own advice and can't stop pursuing success. In the last verse of the song, Kanye sings Cudi's chorus, showing that just like Cudi or a younger Kanye, he is still consumed with chasing greatness.