The market cap is about 30,000 btc, it is unreasonable.
After 60 days of mining, assuming all presale is sold including the 3% for devs+bounties, there will be 415296000 coins in existence.
((64800-21600)x768)+(21600x1024)+(2000000000x0.18)
Using the normal rate not the early bird price this implies a market valuation after (60 days) of 2151.23328 BTC at current rates $1,346,930. At launch, before mining starts the market cap will be closer to $1,150,000. Miners will not have much control of the market in comparison to initial investors.
No idea where you got 30,000 btc from, when all coins have been generated (not for a long time), 2000000000 coins at a price of 0.00000518 is still only a 10,360 BTC market cap.
Personally I think there isn't going to be a large instant profit by investing in the IPO, but I think maybe a conservative 50% short term increase if the launch goes well.
(Disclaimer I invested 5BTC)
You are right.
Q: How much will Syscoin be for presale?
A: 100000000 Syscoin
It seems the OP has a mistake.
The presale is 300000000.