Go to your coin control (enable in settings/display then in the send tab) and look to see how old your coins are. after each stake, the coins need about 24 hours to become mature again and eligible for staking.
So that guy with the 902 coins will not have any more, unless he buys them on bittrex, until 24 hours from now.... at which time he will have, how many?
I hope I am correctly understanding you?
correct, his 902 coins cannot stake again for 24 hours. in 24 hours when he stakes again, he gets 902*2.69 + 902 (which is the same as 902*3.69 which is why I just use 3.69^x in my calculations since it's easier) = 3328 coins
There are currently 6000 coins, that number will continue to climb until this 24h period is over. Once that period is over, you can get a much improved estimate for the total coin supply.
Now here is where you compare him having 3328 coins tomorrow to someone with 60 coins today and say "omg looks he'll control 75% of the coin supply"
Not exactly: At the time I posted my comment, his 902 coins were almost exactly 1.6 of the total coins in existence. Apparently more coins are being staked while the 24-hour period "freezes" temporarily his accounting of new staked coins and may seem smaller... I can assure you by the time he gets his total up to 3328 coins tomorrow, he will own MORE than 1/6 of the total coins. And those increments will continue for the duration of the Growth Period.
It is quite easy, by the way, to calculate right now a minimum of coins he will end up with when Growth is over, even considering that there may be left 5 days or 4 more days. By extension, it will be quite easy to have a valid approximation of what the total amount of coins will be. In 5 more days he will have roughly 2,280,000 coins. It it is only 4 more days, the amount will be just over 600,000 coins. I am estimating 5 days and close to 10 million coins total of which he will have 25%. The other 4 guys will probably have more than that altogether so the group will control substantially more than half the total.