The modern system of human values dictates all people that human life is the most important thing, which we can have. Although there are a lot of situations, when people make the decision to stop one's life through euthanasia committing. In some cases for those, who forced to live euthanasia seems to be the only one correct decision. In addition, there are not too many among such situations.
Usually people name such cases, when person has some incurable disease, which brings a lot of sufferings, or has no chance to survive after some crucial accident. In order to allow person to finish his or her life without sufferings, members of the family can make the decision to stop the life of martyr. Of course, it may only seem to be so simple to make such decision, but in the real life it requires the strongest willpower and character, since stopping the life means, in fact, killing the member of the family or friend.
Some people, which have the strong religious beliefs and views, may prove that euthanasia is the great sin against the God, but very often real life requires to make some complicated decision in extra cases. Today the problem of euthanasia has no common agreement and proof, since it is truly personal question, which should cover only the closest people.
In case sufferer does not have family or current friends, who are able to make such kind of decision, doctors as the only authorities can decide whether to commit euthanasia or not. In any case, it will never turn into the global necessity, since nobody wants to have the power and decide who should live or die.