Regarding security, Mintcoin is similar to Peercoin (which has done fine security wise) with the additional benefit that MINT is 100% full PoS now. The greater security risk is in PoW because the mining game is already so saturated. Mining a new coin nowadays is never going to have a fair distribution because of mining monopolies. Mintcoin was mineable with Scrypt back when things were "fairer" and made the switch before the ASICs hit the market..Now, with the full PoS, it requires you to directly invest in the coin in order to have that kind of weight. Staking weight is unique weight, vs mining gear that can be used on any other coin. That is the brilliance of PoS. The stake you have is what helps ensure security. If you don't trust it, don't invest in it. Obviously some people really trust this method.