As you get older, long term international travel gets more and more difficult. It can be very valuable as an input on your perspective and worldview, which has long term benefit for ambitious people. PG addresses this in his lecture on doing a startup:
"You can do things in your early 20s that you can't do as well before or after, like plunge deeply into projects on a whim and travel super cheaply with no sense of a deadline. For unambitious people, this sort of thing is the dreaded "failure to launch," but for the ambitious ones it can be an incomparably valuable sort of exploration. If you start a startup at 20 and you're sufficiently successful, you'll never get to do it. "
I largely agree with his perspective. If you are naturally finding yourself at a 'break' (eg, finishing your degree) and you know it's something you want to do, I'd recommend doing it given it will only get harder to do later. Maybe if you aren't fully confident, try limiting your risk by committing to travel for a shorter period of time (eg, 3 months) then re-evaluate the value you feel you're getting from the travel to see if you should extend for another 3 months.
Traveling is hard to quantify the value for because you often won't see the benefits for a long time - it will often subtly affect your perspective in small but important ways over decades by increasing your general human empathy and understanding. And given you have a very employable degree, you will probably not have trouble finding work on your return, which is the biggest risk.