looks like the chain is stalled, prolly due to high PoS diff and many people moving out of stake, guess we'll have to wait, or maybe dev can hardfork this to reduce minimum PoS diff.
also anyone with mature coins should stake at this point!
Im 40 minutes away from a Pos block but its been counting down pretty slow like 1 minute each 10 minutes.
your coins will not mature any further unless the chain starts moving, maturity is based on blocks passed not on actual minutes/hours/days. the only saving grave is is someone staking currently finds a nounce to solve a high diff pos requirment