Bitshark.se has been online since 2012, which is a positive sign for any website. But that's where clear signals start to fade. The site uses modern encryption and a fast content delivery network, so the technical side is handled well. However, it doesn't have an about page, there's no visible contact information, and the domain ownership is private. That combination makes it hard to gauge who is behind this site and what they do.
For a website that has been around this long, you'd typically expect at least a simple page explaining its purpose. Instead, visitors are met with a 'Just a moment...' screen and bot protection that blocks automated checks. That doesn't mean the site is a scam, but it does mean you're flying blind. If you're considering signing up or providing any personal details, you have little way to verify the operator's legitimacy.
Before using bitshark.se, ask yourself: do I know what this site is for? If the answer is no, that uncertainty itself is a reason to pause. There are plenty of websites with similar technical quality that are more open about who they are. In short, bitshark.se isn't obviously dangerous, but it also doesn't earn the benefit of the doubt.