Putin has basically promised that any territory he invades, he will preserve trump's mineral rights in. More worrisome, Putin implies that trump asked him to agree to this. That means trump is making arrangements to sign a deal for mineral rights with Zelenskyy, and then betraying Zelenskyy and surrendering the entire country to Putin.
Putin would consider that a good deal. He gets all of Ukraine, minus a few mineral rights. And even those mineral rights he could re-decide after all this is over. trump would have absolutely no leverage when it is all over.