The theme that i would use for Great Expectations is to value what you have. This theme is what I think the book Great Expectations is mainly about.

One example, is that Pip wanted to be a gentleman and wouldn't accept anything else. He got what he asked for and left for London soon after leaving behind his two only friends(Joe and Biddy)without a regret.In the end, because Pip did not valuse his two friends he lived alone feeling miserably for his actions towards Joe.

Another example, that supports this theme is when Pip wanted Estella (who did not love him) when he could of had Biddy who treated him like an actual person. Again in the end of the book, he wanted to marry her.

Finally, an example is when Pip started to spend all of his money that his benefactor gave to him. When he realized what he was doing was bad, he and his friend Herbert were already in a huge debt. Therefore, this is why I think this is the theme for Great Expectations.