Investment firms joined the fray in yesterday's launch of the privacy-focused cryptocurrency known as Grin. : Grin, a new privacy-oriented cryptocurrency, has long drawn the interest of cypherpunks. But another group turned out in force to mine on the network that formally launched on Tuesday: investment firms. “We have been watching the whole show today. With maybe the most expensive genesis block one in history,” Dovey Wan of Primitive Ventures told CoinDesk. CoinDesk contacted several investors who were also closely watching yesterday’s launch of the privacy-focused cryptocurrency, which is being developed using the technology known as mimblewimble.