What is considered a lot of money in Korea?

Excuse me, I'm a bit of a newcomer to Korea and I'm trying to understand the local financial culture. Could you please tell me, what is considered a significant amount of money in Korea? I'm not trying to be rude, but I've noticed that money values and perceptions can vary quite a bit between countries, so I'm just trying to get a sense of what's considered substantial here. Thank you for your time and patience.