I'd be trolling if I said the lesson of the article was that when you (only) need $5m, the key is to realize that you already have it; so I'll say the lesson is

I'd be trolling if I said the lesson of the article was that when you (only) need $5m, the key is to realize that you already have it; so I'll say the lesson is to leave no stone unturned, especially the stones closest to you.