Considering PRC has been around for like 19 months I definitely trust the owner. So yeh, most of my dice investment budget is at
www.prcdice.eu I had my investment there for around 10 months and for every coin my return is now 1.75 (so 0.75 profit per invested coin.) However this changes a lot every time and variance can be crazy when whales come by. A week to test is not really enough to say anything about the return / profits. I am invested for 10 months but most of my profits are because of last few weeks.
I have also little bit at ninja though, they seem fine and nice, but they are new like DB was too (and that obv turned out to be a scam - I never invested anything there tho)