"The safest may become the most dangerous"
Homoeopathic dynamic remedies are the safest remedies, if used properly, but most dangerous, if repeated frequently, in high potencies.
Remember, the "law of minimum" must be followed.
Even 30c is a very high potency. 6c is also very powerful. One dose of 6c brings miracles, if selected Homeopathically.
It means, highest potencies, repeating frequently, can't be justified, as proper use.