I believe that the most fitting answer for this question would be Victor's curiosity and thirst for knowledge. Although this is typically seen as a positive characteristic, it ends up consuming Victor and contributing to his downfall. It leads to him creating his monster, which ultimately destroys him in the end. Hope this helps.
"When doing a persuasive speech you have to keep in mind that you want to convince the audience to believe in what you are telling them, or support your claim, in this case you are already biased by this desire, the key to persuade people is to know how to convince them, and you can do this easiyl with strong writting and a powerful delivery."
