What is the use of $mnt in mantle?

I'm curious, what exactly is the purpose of $mnt within the mantle ecosystem? Could you please elaborate on its functionality and significance? I've been following developments in the cryptocurrency and finance sphere, but this particular aspect remains a bit of a mystery to me. Could you shed some light on how it fits into the larger picture and how it might impact the overall functionality and performance of mantle? Your insights would be greatly appreciated.