Try other calculators. If you take in consideration the rise in difficulty, you need to half the output every month. For example you will make some $30 first month, then $15 next one, $7.5 the third one and so on... you will never recuperate the $200 invested.

Because it's a rip-off. The hardware prices are twice or four times what they need to be in order to be able to make a return on your investment. It's more profitable to have a quick turn-around of capital that way. Check the facts with one of the online calculators like this one:
http://minercharts.com/
Plus, I am positive they get to hold your money, not the actual hardware, for months and play 'investment' with them.

US Treasury’s Financial Crimes Enforcement Network “Reaching Out” To Bitcoin Businesses

http://www.infowars.com/us-treasurys-financial-crimes-enforcement-network-reaching-out-to-bitcoin-businesses/

This is sooo sad...

I did input the data for a RedFury (2.5GH/s at $200). Current exchange rate $737 per bitcoin.
In first month it makes $30, second $15, third $7, so on, for a total production of $58. Net loss $142.
No wonder everyone tries to unload their ASIC miners on ebay! At current hardware prices, in a few of months will be no more money to be made with those.

In order to make some return ($36 for life of device), a 10GH/s miner would have to cost $200.
A 500GH/s would have to cost only $11k in order to generate $905 for life of device. That means that if you pay $12K for it, you are losing money.

The coins are just bits on different HDD's somewhere. If that magnetic information dies, bitcoins are lost.
For that to happen, it would require that everyone having the chain stop using the Internet or at minimum the Bitcoin P2P software all together. What would lead to that is another story. Cataclysms, ultra depreciation, laws and regulations...

Also, when all the 21 million coins will be minted, any transfer will deduct a fee, but no more coins will be generated to cover that. Will that lead to destruction?

And, most of the time, it is a Ponzi scheme. Even the paper currency by itself is one. But governments call it 'inflation', sounds better. Or 'social security'. Or 'taxes'.

Sure, only you can make bitcoins...
Thanks.

I just joined this pool. I have the latest bitcoin-qt and guiminer.
However I see on my account page "Workers not connected", but I have still reported shares and average speed. I had to stop/start the miner once because it stopped.
Please help me understand.
If I try to create a worker, that page gives an error.

Also, I get "warning: job finished. GT450 idle".

I am using this with a NVidia GT450. The default OpenCL works (at 42-43 Mh/s), but CUDA doesn't.

LE: I found how to do it. It makes only 36Mh/s.

I don't expect miracles, maybe just for fun... MY PC is on all the time anyway.

I did install Bitcoin QT (v 0.8.6 beta) previously and it created the wallet. Then it crashed
Now is still 'synchronizing with network' - 51 weeks behind...

First of all hello to everyone - this is my first post here!

Second: What brought me here is the fact that I have installed the Ufasoft Coin client (ver 0.76.0.0) and I right-clicked the Bitcoin to 'mine'. But nothing happened. The 'State' is 958 days ago, Mining 0.0 MHash/s and 'Peers' is 8.
CPU utilization for 'Coin.exe' sits at 0%.  GPU-Z shows GPU load at 0-1%.
Is there anything else that I need to do to make it work?
My rig has a NVidia GT450 GPU.