OK, fine first of all you should have minimum coins to stake, You can stake the coin with minimum quantity, And you can also stake with whatever coins you have in your wallet but 'By staking with lesser coin you can get reward late because, The person who having more coins will get stake fast and his coin will get mature faster' To avoid this kind of problem, The person who was having less coin will had his coin to staking pool, at this time he can also get the coin at the same time like others.......