Tezos is a liquid PoS (Proof-of-Stake) blockchain network. This means that Tezos tokens retain liquidity even when staked and can be sold or exchanged at any moment.

In Tezos blocks are generated every minute with a fixed reward of 80 tez per block. Inflationary model is mitigated by the fact that delegating XTZ for baking garners rewards. By staking Tez a network user can actually gain extra value despite the inflation.

Tezos is open source. So any community member can propose his piece of code and bakers vote to accept the proposal. 

Tezos also supports smart contracts and is designed with formal verification in mind which makes its security framework quite robust.