Yes, there is a tipping point in sight for Iran, and they need to proceed carefully, because their actions could have drastic consequences. With Iran becoming more and more extreme, and with their development of nuclear weapons, they need to proceed with caution. If Iran uses military force, it could escalate into a large-scale conflict with many deaths.
There is probably going to be something that may cause Iran to tip but exactly what it is I do not know if there is going to be one at all that is but I do know it is in a very fragile region and unfortunately there may be a tipping point in sight.
It's been said many times before that there is a tipping point in the near future for Iran, but its never been the case (ironically, the one time there really was a tipping point, nobody really expected it to take place). Iran is staying the course as they has, status quo.
Unfortunately, Iran is nowhere near a tipping point at this point in time. The fact of the matter is that the country's leaders are still quite radical. Even as the general population becomes more and more moderate, the leaders refuse to come into the 21st century. Change is still necessary.
No, there is not a tipping point in sight for Iran, because the group that is in power has a stronghold on that power. Until that power group becomes weaker, it does not matter how many people in the country want change. The power is in the hands of the very few, and that is the way it will stay in Iran for now.