I'm just starting to learn about POS coins, and I have some questions. Can someone help?

If 99% of coins are in locked wallets and therefore can't stake, can the other 1% hold the network? Or should most of the coins be staking?

Does it depend on the % of coins staking? Or rather on the number of wallets POS mining? Is there a minimum number to hold a network going?

Let me know if what I just asked has no sense and I'm focusing it wrongly.