basically following the Lord means whatever is in His will. Some He calls to poverty…such as the religious, who take vows of poverty. It depends. There isn’t a rule.
Our lives, whatever religion we are, (or no religion) include suffering no matter what. Everyone suffers in different ways. Catholicism offers us a way to make this suffering useful, to let it help sanctify us… because Christ has sanctified suffering by going through it… He told us to pick up our cross and follow Him. This doesn’t mean just suffering, it means what we DO with the suffering we get.
it’s not always poverty. Some people have more ‘hidden’ suffering. Interior trials and such. Again, it depends.
the problem with the prosperity gospel is that it denies the idea that God takes something bad like suffering and turns it to good (our sanctification). People who believe this are missing out, IMO. Because no matter what, life on earth includes trials. We are to embrace our crosses and carry them after Christ. Unite our suffering to His.
The Saints even thanked God for their suffering.
Sometimes it also serves to purify us… for example, if someone is really materialistic they might end up losing everything but hopefuly they won’t lose their soul in the end. If someone is not materialistic, it would be good for them to do something to help the poor, simply out of love for God.