After my previous trite comment, I've just read through some of the earlier posts. Regardless of your opinion as to whether drugs should be legalised for medical and/or recreational use, there is solid evidence that repeated use of cannabis has a strong association with mental health problems, typically those conditions that lie on the schizophrenic spectrum.
In some cases, that association is in the form of substance misuse following the development of mental health problem. In a great many, prolonged exposure to cannabis precipitates the first presentation of psychotic episodes in someone previously well. Whilst the use of cannabis alone may not be enough for a person to endure such a breakdown if they are not already vulnerable to pschosis, for those predisposed the increase in risk is astronomical with prolonged exposure.
OP, as a person who has bipolar disorder, you have already declared yourself vulnerable to developing psychosis. I strongly suggest that you seek assistance to end your cannabis use as a matter of urgency as your habit is likely to be of enduring serious detriment to your mental health. If you develop a psychotic disorder such as schizophrenia, your life will follow a very different and very unhappy path that might be avoidable. Speak with your psychiatrist about this and request CBT and / or psychodynamic psychotherapy as an adjunct or even replacement for your existing drug regimen (including that for PTSD).