Alex simply couldn't decide whether the Elixir was worth it or not. There were still so many inquiries he had that he couldn't get an answer to just by himself.
From what he could see through his point of view right then and there, the Elixir was not worth it at all. After all, he was so used to fighting fights where he easily got hurt and regenerated.
He couldn't do that with Elixir in his body, as that would waste all the Elixir he gathered. It simply didn't fit him at all.
Alex was a little disappointed to realize that, considering how much he had spent, but it was good knowledge still. Now he could focus on other things like cultivating and training against beasts.
"Do I still need to keep eating those beasts?" Alex thought. "If Elixir isn't going to help me, then there's no point in wasting my time consuming all those beasts, right?"
To him, his reasoning was sound. But something inside of him was annoyed by something there.