20001 Block will come in a day or 2. And yes, 10 coins per block. 9 will go towards MNs and 1 as Pos reward. There will be interesting situation. if total number of MN does not increase , those who are running nodes, will get a lot of coins from the block reward. But after 1 day or 2, people will have more coins and they will create even more MNs with them. So ultimately profit will be decreased.