Is it reasonable to give up everything for an opportunity abroad?

Hello friends, I received an offer from a company in Poland. I actually want it very much, but the salary they offered is almost the same as here, meaning I would just barely get by. It seems very reasonable to go for my career, but to be honest, I'm really scared about whether I could manage it all by myself there. If I stay here, should I ask my boss for a raise, or is this opportunity something I won't find again? I'm really confused.