256 Ventures — absolutely useless
First of all, not even web archive knows anything about this website. That may mean that either it has never taken screenshots of this or the website was created recently or this domain was used by a different company.
At the same time scamadviser.com says the website was registered 170 days ago, so yes, it's not that old.
Then I have a question: did this venture fund stop working or was it waiting for something?
The website provides their portfolio only and says that this company is a global cryptocurrency fund. Is that all investors have to know?
There's definitely something wrong, so I recommend you to stay away.