Alright, let's see if we can answer some of those questions.
- will you back out if you have less than 600 GH?
Not necessarily. Other than your hashing speed vs the network's, there are a few other important variables when it comes to mining; 1) The cost of your equipment in Bitcoins, 2) the price of a Bitcoin in fiat, and 3) the cost of a kWh in your area (or wherever the equipment is situated).
So long as running a 600GH/s machine is profitable, it will more than likely stay online and hashing. Maintaining profitability comes down to covering energy and space costs, which typically comes down to a payment in fiat (at some point). Even at a 10x difficulty increase (to 38B), a 600GH/s miner using 600W will still be marginally profitable, netting about $20 each week ($35 in BTC
at current prices - $15 in electricity @ $0.15 / kWh).
It's not much, sure, but it's also not negative, especially if you live in an area with cheaper (or free) electricity.
- will you try to get a higher order miner (in the size of Tera Hash?)
If the price, size, and energy efficiency match your needs/wants, then sure.
- How it is possible that such BTC address has that TH rate now?
As HellDiverUK already noted, those addresses typically belong to the largest mining groups.
- you think one of the ASIC providers will be able to ship before the complexity get to high to even this new miners can't take more than some dollars each day?
You may want to check out
BitMain and their AntMiner line of products --
https://www.bitmaintech.comThey ship out gear every few days from their stock, no need for pre-orders.
- Is really the future mining like it seems when this new technology comes finally out?
So long as there's a cost effective way to develop a faster, cheaper, more energy efficient ASIC for mining, yes.
- EXTRA ADDED: also build one on your own will make it less profitable even to a point where you could not make a home made option because it will not be able to get back what you used for build it on first place at maybe some like 0.00000979 BTC per day [don't know if I do this calculation ok]
Not quite sure what you're asking here...
Seem I haven't seen the whole picture
https://blockchain.info/charts/hash-rate march 14 the max hash rate is 35,659,964 GH.
If I'm not wrong 35,659 TH and if the address is making 901.66 Th/s... it isn't making alone more hashing operations that the whole net?... lol.... I guess I failed in understand this.
The 900TH/s is part of the network total 35,659TH/s, so no, it wouldn't create more hashing operations than the rest of the network...if that's what you're asking?