How much Tezos do I need to stake?

Could you please elaborate on the question, "How much Tezos do I need to stake?" I'm particularly interested in understanding the factors that influence the amount required. Does it depend on the staking pool I choose? Or does it have anything to do with the overall network participation? Additionally, could you explain the potential benefits and risks involved in staking Tezos? How does it impact my holdings, and is there a minimum amount required to start staking? Your insights would be greatly appreciated.