I think your best option is to be practical. You're unlikely to be so old that in 20 years you'll be too old to travel. Having kids just means that, at worst,

I think your best option is to be practical. You're unlikely to be so old that in 20 years you'll be too old to travel. Having kids just means that, at worst, you have to wait until they're 18 before you run off globetrotting. In the meantime you can still see the world, but you might be limited to their holiday periods. If you're on a H-1B then don't forget you've seen more of the world than the majority of people who don't leave their own countries, ever. Aging parents are trickier, but this comes down to how much money you have and how important it is that you are the primary carer. It sounds cold to put it in those terms, but if it comes down to it, that's the decision you're making - 24/7 care is certainly something you can buy (and might actually be better than what you personally are be able to provide).