It's possible for past hardships to leave you emotionally messed up for years, which could make it harder for you to deal with future hardship.
I don't think there's a hard rule on this, and it depends on the mentality of the individual. It's possible for people from rich and poor backgrounds alike to be resilient.
But I do think emotional security helps you deal with challenges in life. It's not the only thing and it's possible there's other ways of dealing with it. But growing up in a secure environment makes a difference (note, this doesn't necessarily mean rich. It means stable. If you're rich, but a close family member dies when you're young or some other hardship occurs, you can still be emotionally hurt despite having an otherwise secure environment -- that's why it's a bad idea to judge people on their backgrounds, you never know the full picture)
There are different levels of hardships. Having to work hard and sometimes having less to eat or winning some easy fights with bullies may make you more resilient. Being mugged every month, beaten and abused by parents every week may break you.
I don't think there's a hard rule on this, and it depends on the mentality of the individual. It's possible for people from rich and poor backgrounds alike to be resilient.
But I do think emotional security helps you deal with challenges in life. It's not the only thing and it's possible there's other ways of dealing with it. But growing up in a secure environment makes a difference (note, this doesn't necessarily mean rich. It means stable. If you're rich, but a close family member dies when you're young or some other hardship occurs, you can still be emotionally hurt despite having an otherwise secure environment -- that's why it's a bad idea to judge people on their backgrounds, you never know the full picture)