Well, most people like to go to Hajj after they're old and free of most responsibilities (children, jobs, etc.). But the thing is, would if they don't live long enough to "be free of most responsibilities"? Hajj is compulsory at least once in a lifetime on every Muslim man or women who has the wealth, health, and has reached puberty. If they meet those conditions, and yet don't go, then that won't be so good. Would if they end up never going? That is why you shouldn't wait if you have the means to go. You'll always have responsibilities. Not to mention, would if you die now? You will miss the beautiful opportunity of going to Hajj and earning so many rewards and getting rid of all sins. So, if you have the means now, then go to Hajj this years, my friend. You can always go again if you want. But at least one Hajj will be complete, which like I said, is compulsory on all Muslims who are capable.
As an adult, because the travel is arduous and hazardous, but before you have family or business obligations that would be disrupted. Be sure that your faith is sincere and strong. Just going to say that you have done the Hajj will bring you no merit.