Here’s a rough calculation to assess the increased risk of a 51% attack:
- The voting participation rate in topic governance currently stands at 60%.
- Given the higher impact on rewards and the notifications provided by the NNS app, it seems reasonable to expect that the portion of active neurons (as defined in the proposal) would be higher. A portion of 80% seems like a plausible assumption.
- With an 80% participation rate of active neurons, an entity would need to control 40% of the total voting power to achieve a majority (50%) of the active voting power.
- Accumulating such a significant share of voting power would likely be prohibitively expensive (e.g. acquiring nearly all liquid ICP tokens).