I want to buy my fiance an apartment
Is there anything wrong with the current one?
No, it's just not my money, I have enough money for me. He has nothing.
It's good to support a partner if you have the resources to do so. They'll appreciate and value you more if you do. Just be sure they're okay with the support and that you're not overstepping any boundaries.
That's true. I decided to give it to him as he was really happy when he heard about it.
It is good that you are so willing to help out your partner. They are so lucky to have someone like you in their corner.