[xur17]

> There is absolutely no way to 51% attack a major coin like Bitcoin for as little as $700k an hour. They are extrapolating from Nicehash's mining rental prices, but Nicehash doesn't have anything like the capacity you'd need.

You are correct - the nicehash-able column represents the amount of necessary hash power that is available via nicehash. If it's below 100% the attack cost is also greyed out.

Disclaimer: I build crypto51.

[henryfjordan]

the grey you picked is pretty hard to distinguish from the black. The italics are nice though. Maybe add a little icon like this "no power" one: https://thenounproject.com/term/no-power/632253/