The question becomes more interesting when you consider that the scenario doesn't give you infinite power to do anything, just no consequences for what you do. I mean yea if you stole a million dollars, you would face no consequences, but realistically speaking, could you steal a million dollars even if you tried? Some other people here suggested murdering politicians (which is pretty fucked up tbh) but it's quite likely you'd never even get the chance to do this within 24 hours, especially considering many politicians have security people.
I'm really trying to rack my brain for the most impactful thing I could even do within 24 hours, without consequences. One idea would be to loan as much money as I possibly could and transfer all the money somewhere else, assuming the debt is cancelled at the end of the 24 hours as it is a "consequence".
I wouldn't (and probably couldn't) do anything more extreme than that. The consequences is not what is holding me back from being a murderer ๐ , that's just my moral compass.