the young prince would likely never have grown up to live a full life. he was a hemophiliac. it's conceivable he probably wouldn't have made it past his teens as he was a sickly child.
Like said--"if he lived." He was quite ill, as there were no coagulant drugs in Russia at the time that would have helped him. Also, as I said, he was fairly strongwilled (read: spoiled) and tended to injure himself by doing stupid things for a person with his condition (ie, sledding on an ice-covered hill, sliding down stairs on tea trays, etc).