bitcoin investment trust, links to it can be found on Tor.
A hidden investment trust, under ToR, where you send your coins,... then what?
Not your keys, not your coins. For me it sounds extremely shady. I would be wary to send my coins to a new/not yet known company even if they make public info about themselves. If they are hidden, there's a very high chance you'll ... make them a donation.
I am also not sure of what OP is referring to. There is a big possibility that it can just be another "scam" project out to get as much money from unsuspecting public because why would that be advertised in TOR in the first place. I am not actually judging but we know how riddled with frauds is our industry so we have to be careful in dealing with anything promising us the heavens and the stars all for doing nothing but just giving them the money we have...we can end up just holding empty plastic bags full of air.