If you want to place a limit (either low or high) on a market, you need to be able to absorb all of it potentially.
If you want to limit the price of Bitcoins to at least 10 USD/piece, you need to have over 70 Million USD available on an exchange site to buy all Bitcoins. This does however NOT mean that you can on the same time (with the coins sold to you) place a limit on the maximum price too (e.g. at 12 USD)! For this you'd need additionally up to 7 million Bitcoins to sell them to anyone who wants to buy coins. If you don'T provide them, the price might move away if people are eager to buy coins.
No, you need $210,000,000.00 to set the price at $10.00 vs. the number of BitCoins that will ever exist.
Currently, let's say you have 7k USD:
You can place a bid for 7 million BTC @ 0.001 USD/piece. I don't see however how this will stabilize anything or how it will make people more confident in BTC.
Again, you would need $21,000.00 to set a price minimum of 0.001 $/BitCoin. You need to account for production that is yet to come.
Of course, not all of those 21,000,000 BitCoins have been minted yet. So your actual price (for now) if you had that much capital in the pool would be 0.003 $/BitCoin, but that number would go down over time if the amount of capital you had in the bloc never changed.
If you want to stabilize the price at at least 10 USD however, once you bought 700 BTC the price can go below your limit again, so you either need more money or you have lost. Also now providing a "ceiling" with these 700 BTC at 12 USD/BTC will only work if the price climbs up again. Then however you will have made a nice 20% earning and can start to enforce the 10 USD limit with a bit more money again and so on.
If the goal here were to day-trade BitCoins at markup, you'd be correct. This isn't about speculation, it's about stabilization.
In reality I'd try to not write a network of bots and require people to trust you and put money in a fund (this is what you actually invented - if 100 people have 7000 USD each then you have a much bigger power than 100 uncoordinated traders on their own) but just code a bot that takes your 7k USD, buys at current prices and creates a bid at a level where it is profitable (let's say 2% more, since you had to pay exchange fees). Continue to do this until you can buy all current coins at the level of your choice (which might potentially take quite a long time - and also has some risks, like selling when the price is on it's all-time low). If you want, you can also invite others to invest in this bot and you can gain money faster that way (via GLBSE for example).
NOTHING you described however is anything without risks, new or original!
No, the concept of a price bloc is very old. OPEC has been doing it my entire life. The method you describe is a scalping bot - again, not a producer of stability.
Your error is that to break a price block at once, you simply need money. There's no way around this. Writing a bot and distributing it amongst miners might be a way how to do this, but in the end your success depends on how much money these traders have and not how well written your bot software or algorithm is. Also what you're suggesting is already happening, constantly: Every trade is an attempt to set a stable value for bitcoins. If you want a ceiling value, you'd simply need to put up a bid at this value with all your Bitcoins you have in posession - if these are enough, you will have created your block, if they aren't, you loose. The same goes for any other strategy - the more money you have, the easier it is to force a price.
The bot isn't run by miners, it is distributed amongst mtgox accounts. Not every trade is an attempt to create a stable price, in fact many are simply a method for profiting regardless (and maybe in spite of) of long-term price stability. Yes, to create floors in a market you need a lot of buying power. Yes, to create ceilings in a market you need lots of product to sell. Yes, having more money gives you more power in a market. The purpose of this bot is to simulate that level of power without anyone actually having the fiat or BitCoins in hand to force the market by themselves.
Actually, if you want to manipulate prices with a low amount of money, you need a lot of smaller exchanges (like Tradehill), then you can play "god" more easily. As it is easier to transfer BTC than USD however, you might think of lowering the BTC value though. If you then manage to force the value down at the same time for a day or so on ALL other exchanges (remember: MtGox = ~90% of volume!) but MtGox (which is not as difficult as it might seem!) you could succeed in even causing a dump on MtGox, as all exchanges but MtGox show constant, lower prices on bitcoincharts. The same might work the other way around, but then you have the problem of being able to transfer a significant amount of (foreign) money to a multitude of exchanges.
Why am I trying to force the price up or down? I'm trying to limit it at both ends at the extremes. What you're describing is a distributed pump-and-dump attempt to manipulate prices to take advantage of the market - the exact opposite of what I'm trying to accomplish.
http://bitcoincharts.com/markets/ - the total volume today "off MtGox" is ~10-15% of the volume on MtGox and many have volumes below 100 BTC. If the WHOLE page is completely red with BTC being worth 5 USD and equivalents in other currencies, this might also lead to panic sales on MtGox, causing a crash there as well - even though you wouldn't be able to manipulate them directly due to the volume there.
And that's just counterintuitive - that I should distribute buying power across a huge number of minor exchanges instead of focusing it on the dominant one. The vast majority of instances where there are major differences between mtgox prices and another exchange is due to the fact that mtgox fluctuates so wildly.
You of course also risk that people don't panic + you have the problem(?) that BTC might not crash far enough, so you could end up with a loss after buying back BTC on all these exchanges. If you're lucky though, a few 1000 BTC might be able to cause crashes on MtGox far bigger than selling them directly there and earn you a really nice profit in BTC. To pull this off, you need either to have lots of money yourself OR a big fund + people who trust you with their money. If you start out big enough, you might even be able (as you will tell your share holders the time when you pull it off as well) to use a multiplier effect. You need to make sure however to only let in "big fish" in the pond, as you can also be screwed by people buying your dumped BTC while investing only a single BTC to your fund to get the insider info.
So basically I should use this method because it's more work, more risk, doesn't remotely approach the idea of what I want to do by creating instability in the market, start a company that trades shares to do so, and then only allow people with lots of money into the fund so that we can manipulate the market screwing out the little guy without letting the average consumer take advantage of BitCoin as a real currency?
They must not teach reading comprehension where you're from.
The goal is to create stability - the bot is merely a tool to help generate a price bloc, which is the actual tool that creates stability.
The purpose of a distributed price bloc is to democratize the process of bloc membership and prevent the bloc from engaging in price fixing that would damage the actual stability of BitCoin.
No amount of money less than hundreds of millions of dollars will stabilize the BitCoin economy in the long term. Either we can leave it to the public to do so en masse without any helper guidance (and have wild fluctuations and manipulation like we have now), we can leave it in the hands of banks who have that kind of money just lying around (thereby destroying BitCoin), or we can try to generate that kind of purchasing power without involving big money (which would require large-scale automatic cooperation of people who can only contribute small (less than $100.00 apiece) amounts to the overall project, but can't afford and don't deserve to have their money turned over to an outside party that is controlled by a few people.
Which do you think is a best potential outcome for BitCoin as a whole? Which do you think I'm trying to achieve?
Edit history - $21,000,000.00 to $210,000,000.00 math typo fix