Right now in this moment
Thu 11 July 2019 22:08 UK time
That's a sizeable number. Almost as big a fraud comitted by a single bank: https://en.wikipedia.org/wiki/Danske_Bank_money_laundering_scandal
It would be easy to calculate the current price of Antminer, current difficulty, ignore the difficulty adjustment and come with some number.
But in reality, there were many different hardware, difficulty was changing and as a result I'm rather unsure - how much money in terms of HARDWARE and ELECTRICITY was invested into Bitcoin?
Feel free to make reasonable assumptions, such as 10¢ per kWh.
PS. I love everything about Bitcoin, specifically math, cryptography, economy, and physics - conversion of energy ⚡️⚡️⚡️