This is what I've learned from my teacher, I'm also not 100% sure about what he said but still it is interesting to share: my teacher said that Kundalini is actually the final and most powerful chakra point in a body, it located near the chest. However, he said by all mean do not try to learn it. When opened Kundalini, it will dramatically increase body heat which surpasses human's limit, and so becoming crazy or even death is possible.
That's what I hear, but it sounds really scary.