Is insecure attachments as a child associated with bipolar disorder as an adult?

No: There is no evidence that bipolar disorder comes from attachment difficulties. It is generally a genetic illness.

Not Necessarily: Severe attachment problems in childhood can be a risk factor for a wide variety of emotional and behavioral problems. However, there is not a clear association between childhood attachment problems and adult onset bipolar disorder.

Depends: Any stress, such as insecure attachment situation, can make easier expression of a genetic vulnerability be it depression, anxiety, or mental health syndromes. Depends on the family genetic history and of course the emotional environment. But an environment that is nurturing is much more neuroprotective e.g. waylay or bypass the gene expression as resilency of the individual builds. Take care.