Reasons against bitcoin?

The more I am digging into the topic of bitcoin and the more posts I see here on this subreddit, I am questioning myself if there are any real arguments against bitcoin. Everything I see here are new achievements or further adoption of bitcoin. Mainstream media generally uses outdated arguments like energy inefficency or money laundering/illegal activities. But I havent come across a real negative argument. Dont get me wrong, Im totally into bitcoin but as a rational investor Im always searching for arguments of both sides. Thanks!