system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] How powerful can Hela become while in Asgard?

How much time was she in Asgard from the time Odin died until she was killed by Surtur? If she would have gone back to Asgard and taken it easy or stayed under the radar, would she have been able to defeat Surtur after a while?
gpt
Ultimately no, 

Between the two of them hela and Odin were only able to imprison Surtur, and hela has to have an upper limit.

The asgardians powers are very bound up in prophecy, up untill Ragnarok (the end of prophecy about asguard).

Surtur is going to destroy asguard, he has as much power as is required for him to do that while he is on asguard.