system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] If Iron Man and Cap traveled for Soul Stone to Vormir instead of Clint and Natasha, who would jump?
gpt
Cap would easily. They might have their differences, but:

1) He doesn't trade lives, but he would  easily sacrifice his own. He's literally jumped on what he thought was a live grenade, self-sacrifice is who he is.

2) He knows that Stark can contribute much more in the long run. He knows that their plan requires Tony more than it requires him. If anything goes wrong with their gauntlet or they need to fix the time-travel or whatever else goes wrong, Tony is the guy that will come up with the solution. As good as he is, he knows that he's just a soldier.