I just checked and this is my result:
- Up to now, premine = 927999.99780000 coins ( check here: http://173.249.7.89:3001/richlist )
- 18 masternodes enable = 540000 coins ( check here: https://mntop.co.in/ )
- Total coins suply = 1882829.86257801.

So 410000 coins left ~ 11 masternodes slot
I checked coinsmarket.com and only 100000 coins for selling.
Roi for masternode now = 730 % ( From block 1 to  20000 : 7.5 MNB )
8430 blocks now, 1440 blocks a day

    - From block 20001 to 40000 : 15 MNB
    - From block 40001 to 80000 : 30 MNB
    - From block 80001 to 110000 : 45 MNB
    - From block 110001 to 155000 : 60 MNB

So we need 1 week and roi will x2 = 1460 ( 18 masternode ).
After 21 days Roi will be x4 = 2920% ( 18 mns )
After 50 days Roi will be x6 = 4380% ( 18 mns )
After 70 days Roi will be x8 = 5840% ( 18 mns )
Good profit, i will buy and mine some to get 1 mn.