Be happy for their success and work hard to be successful too. Even if you don't get to be rich, still be happy for your little wins. Do not fake your status just because you want people to believe you're doing well for yourself when you're not. You never can tell who would want to bless or lift you. By faking who you are, you might miss such an opportunity.
Anyone who hides their true circumstances by appearing wealthy when they're actually poor will remain poor as ever, with no one to help them. Most people won't be willing to help when they see someone who appears wealthy and doesn't reveal their true circumstances, but the situation is different for those who are truly successful. Truly successful people often face no obstacles when it comes to doing anything, including helping others or encouraging others to become successful in their own fields.