A group of humans is a super-intelligence; a group-of-groups is even smarter. The 8 billion of us, together, have an unimaginable intelligence. AGI isn't going to be a problem.
* See also: Kasparov Versus the World, in which grandmaster Garry Kasparov defeated the "superintelligence" of thousands of chess masters combined: https://en.wikipedia.org/wiki/Kasparov_versus_the_World
Encryption is just one example. Its ability across the entirety of math and science would be equally powerful.