It falls a part a bit. You don't need to stake to use a proof of stake system, much like in bitcoin you don't have to mine to use bitcoin. But generally the b

It falls a part a bit. You don't need to stake to use a proof of stake system, much like in bitcoin you don't have to mine to use bitcoin. But generally the bricks you have in play can be lost if the network thinks you are cheating, even lying by omission (downtime) is penalized. So to try to change the blockchain (to allow double spending or zero someone's zccount) or even not to vote for the valid blockchain can be penalized by losing your staked bricks. Another detail lost on the analogy is people get more bricks, just before being a good network citizen by helping the network and staking your bricks.