This calculation is too positive.
You are saying that the difficulty increments will decrease each jump by 3%, this is so wrong...
As soon as all the Cointerra units start mining... haha, I think we will see jumps of 35% or higher.
You are also including that bitcoin will be worth 1% more with each jump, this is very speculative, could be 10% or maybe -10%.
AND you are forgetting the 10% fee...
AND your calculation starts from today...
Feel free to think and decide what you want. It's not my company, but I try to share my thoughts and answer your questions. But please be honest: As you can read above I did not forgot the 10% fee as well as I did not forgot the delay for the hardware ("hardware lead time"). Everything else is extreme speculative and I would suggest ANYONE, use only money you have. If there wouldn't be the slightest risk, would they offer it in public to make such discussions possible. They would offer the whole 10 units to an investor.
Back in 2011 everybody told the power costs more than the bitcoins you earn. Personaly I mined 33.4 bitcoins till now (most of them with my gfx card). This was a risk and I used my opportunity. Make you own decision which risks you take and which not. As the calculator suggests (indirectly) you can also make a buy in and hold bitcoins. Or you can do nothing, live your life and don't profit and/or have risks related to BTC.