Here is a long term problem though, at some point we will reach the physical limits of ASIC chip technology. When those limits are reached then the only way to maintain a 10% of the network hashrate and outpace the continuous difficulty increase will be to make massive amounts of chips. A company with a lot more money will be able to make a lot more chips, so that would mean Nvidia, AMD or Intel could come in at the last minute and start mining themselves and because they have billions to spend on chips they could easily do a 51% attack by having the money to spend on it.
Right now we assume Bitcoin wont be big enough for them to spend that kind of money and that is correct. If Labcoin is to exist beyond the race to 20nm (because eventually there will not be any more efficiency left in chip design), then how will Labcoin compete with the company who can spend a few hundred million on chips?
For this reason it is worth considering releasing a long term growth bond that people can buy into which gives Labcoin a loan for the long term future. This would guarantee that as long as there are enough people who support Labcoin within the community by buying the bond that Labcoin could maintain 10% of the network. It would remove the risks I outline above.
Ciphermine is considering this approach. I wouldn't be surprised if Asicminer eventually does something similar. I see it as one of the few ways to leverage the advantages of being first. I don't think Labcoin will be able to rely on chip efficiency increases for longer than a few years and then the race will be to see who can make the most chips the fastest and sell the most chips for the chapest (and mine). Labcoin will have stiff competition in making and selling chips and the profit margins could shrink.
You have a point, but I think you're overlooking that growth is not only determined by how much money you can throw at it. LC has way more money than they need right now, they have said so multiple times. The chips currently on its way were already payed before all of us even knew LC existed, and the IPO money goes to development of the next generation (65nm) ASIC.
When they use 30% of their mining income to fund further growth, I believe it will be enough by far.
If we pool our resources together to give them, say, another million dollars, that won't necessarily speed up anything. These things not only take money, they take time and skill.
The speed can be increased by increasing infrasctructure, hiring more personel etc., but still only at a limited rate. If they calculate that the income from 30% of the mining&hardware sales is enough to sustain their growth, then that's fine. And I see no reason why it shouldn't be.
Speculating that Intel and AMD might jump into this and kill all the current ASIC companies in bitcoin is really a bit far-fetched IMHO.