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And for certain if he plans on buying gear not renting hash power, he will not buy brand new gear for that, it doesn't make sense at all, you simply want as much hashrate as cheaply as possible, why spend 100$/th when you can get it for 10$ with old gear that is sold at scrap metal price. The difference in electricity consumption will not matter since you're only running this for a day, not to ROI. Besides, 5c/kWh, that's closer to consumer prices in some countries than industrial averages.
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Yes but with 2 or 3 generation old gear, your power NEEDS go up.
In terms of doing something like this, unless you are a major company, a government, or really rich, it's already going to be somewhat difficult to get a facility that has the power & cooling. Adding the need for more power & cooling is just going to make it more difficult.
With that being said, any of the big farms that were in transit, that have found new homes, doing this as a test before going live would be no big deal at all.
BTC would not notice if 1/2 of 1% of it's hasrate came back online a few days later.
The real money to be made from 51% attacks comes from the potential for double-spends, and from the financial markets. Someone who is preparing to execute a 51% attack could sell the ability to double-spend specific transactions ahead of time. They could also place bearish bets against a coin they are about to 51% attack before they start the attack with the advance knowledge the price will likely fall.
You have to factor in the block rewards you would receive if you were 51%'ing BSV, which is around $135k/day.
If you are doing something like this you
probably don't want any money trail looping back to you or your operation.
Just make that chain / coin useless until it goes away. If you have the money to do this and
if my $450,000 number was accurate getting $135,000 back which although a non insignificant amount of money might not be worth it based on the risk / reward. Faketoshi loves his lawsuits. If the coins go nowhere, you can't trace who to sue. Although, it would be funny as hell if they just kept moving, splitting and combining them to make them waste time chasing them.
-Dave