Thank you for your wise counsel, yogani.
I do not claim to be an expert in kundalini and yet since the process unfolded for me without volition in slow motion and to a reasonably advanced stage, what I do is simply share my knowledge which is not academic but rather based on direct experience.
First of all, I discourage people from tinkering with the kundalini and am against any form of practice, other than resting in silence. If kundalini is meant to awaken, it will, otherwise let it be. The aim is God-realisation and we should maintain focus on that.
About this poem, yo-yo meditation, what is it exactly? It is simply a visualisation of descent and ascent through vibrations, just as we have the Gunas ~ Satva, Rajas and Tamas.
Keeping chakras aside for a moment, let us say we know nothing about kundalini and chakras, first visualising a domain of agape love and divine light, we are in singularity, wherefrom we imagine that our undifferentiated awareness becomes polarised and we dip down a wee bit with spiritual vision and intuition but in duality. Lower is creativity and expression, our communication skills and artistic attribute. All doership. This doership rests in the heart, the seat of Self or God.
Energetically this represents the downward pointing triangle of the Star of David.
Reciprocally, there is ascent of animal nature corresponding to the material, lustful and power centric aspirations we nurture. This is the upward triangle which again rests in the heart.
The idea behind the visualisation is to embrace and release, that is, without clinging to any offering. This is liberating.
About the crown chakra, what is there to fear? There is a knot, the fontanel is sealed and we cannot go beyond unless we so choose. Likewise for the medulla. Only on piercing the knot do we go higher to the Bindu point. There are chakras beyond the crown but that is another topic altogether.
I appreciate your concerns, I really do but what is there to say, when I’m openly saying do nothing and remain in silence and stillness?
In fact, I stumbled on this site (and I am glad I did) by accident and initially only commented on what I felt was an inappropriate practice, attempting to awaken kundalini through sexual practice. It is not that I’m a prude but I just wanted all readers to know that if we look at the Vijnana Bhairava Tantra for example, only 2 out of the 112 practices relate to sex. When we cannot even control our thoughts and emotions, it would be hazardous in my opinion to employ sexual methods, involving energy exchange and deludedly thinking that we are in a state of surrender as we try to raise the kundalini chakra by chakra.
I do agree that premature awakening of kundalini activates trauma because of blockages in the system. This is why the kundalini must be allowed to rise spontaneously only. I’m against Shaktipat too but then if we look around, it seems to be in vogue. Unfortunate.
Talking about the crown chakra, here is a link to a short video by Swami Harihirananda ~ https://youtu.be/TzfRI0KGuNg?si=T_2cC9oB4Zl5Vmvc