That should be pinned !
1) When do untouched balances stake [days] ?
1. Untouched balances are eligible to stake after 8 hours. When they will actually stake is a matter of random chance, just like finding a PoW block. But the chance improves the more coins you have and the older the coins are.(and you have 100% chance after year)
2) Will all wallets with untouched balances stake ?
2. Eventually it is most likely that they will stake, you will have to be very unlucky not to.
3) If the answer to quest#2 is NO then which qualifying wallets will stake?
3. read # 1 & 2 again.
4) Is the qualification by random selection ?
4. read # 1 & 2 again.
5) If not all qualified wallets stake, what proportion of the 100,000,000 coins will stake ?
5. read # 1 & 2 again.
6) When an amount is staked how long will this amount collect interest ?
6. Your question makes no sense. Once you coins generate stake, they are added to your balance and are the eligible to stake again after 8 hours old.
7) Is the stake interest rate 1% per annum, per 8 hours, etc, etc ?7. This is compund interest is calculated more info there.
https://en.wikipedia.org/wiki/Compound_interest#Compound_Interest I still don't understand PoS interest!
Then think about it as 1% per year
8. Will locked wallets stake ?
8. No
9) Will encrypted wallets stake ?
9. Yes - if you unlock them, no if you keep them locked.
10) Will unopened wallets stake ?
10. No
11) will unecrypted wallet stake
11) no i haven't staked with opened but unencrypted wallet i had stake after encrypt and unlock wallet it has add me steak 1%
12) how make stake to be count ?
12) encrypt wallet with password, then use command : walletpassphrase Yourpassphrasehere 99999 true
wait 8h and wuala... then go to point 1.
Update correct if needed guys.