There are a lot of pre-mined coins such as Ripple (XRP) and some are going to move to PoS (Proof of Stake) model instead of PoW (Proof of work, basically mining

There are a lot of pre-mined coins such as Ripple (XRP) and some are going to move to PoS (Proof of Stake) model instead of PoW (Proof of work, basically mining). Ethereum being one. There are also plenty of PoS coins out there, although not yet commonly used, but people are aware of the problem and working to fix it.