Wait one day, wait one week, wait one month, we'll stay back and see. An indecisiveness for something which might not exist within one's lifetime would make a claim for which things ought to be reversible or decisions ought to be remade in order for things to be "controlled" in a manner. In this respect, of the practice of "Euthanasia", death is the ultimate goal of avoidance and thus a finalized decision of upholding pain until the very last minute of life in respect to waiting for a treatment outweighs the ultimate outcome of death. The opposition makes a claim that reversibility of a decision that may be regretted later due to it being finalized is better on these grounds, however, if life was controllable in all aspects and under all possible circumstances, we were able to scroll back on our decisions, what meaningful would arise out of the circumstances for which our decisions are made on? What would the product of our actions, time and energy be? Aren't these decisions philosophically what identify us as who we are even to the extent of a life or death situation? Also, even if a cure was possible, what complications will arise thereafter? What if the patient is of old age and will die anyways but has already lived a long healthy life? It cannot be justified to deem that waiting for something which might or might not exist in a future to occur outweighs the prospect of pain. Wait for a miracle "cure", wait for a revolutionary science "discovery" to solve our problems, wait for a technological "innovation"...this line of thought may be wise in some situations but not necessarily in the case of Euthanasia.