By saying this, Pan Gu was trying to remind Lin Ming that although the biggest dangers he would face in this world would at most be Sage realm experts, who couldn't pose a threat to Lin Ming at all, in another world where the God-tier barrier was non-existent and God-tier experts walked the ground, the situation would be different.
After all, the difference between a God-tier existence and a Sage realm existence was like the difference between Heaven and Earth.
In the other worlds, those who could bring danger to Lin Ming were God-tier existences.
On top of that, the current Lin Ming was aware that even the God-tier was not the end.
For example, an existence like Pan Gu had already surpassed the ordinary God-tier.
Since there was an existence like Pan Gu in Lin Ming's world, there would definitely be such existences in other worlds.
Otherwise, how could it be called an exchange?
Such an existence could indeed pose a threat to Lin Ming.