thanks for the feedback and the upvote, I have a question, if I want to run a panel study and do this on a daily basis. Do you think Top 100 are enough?

2-100 are accountable for 30% Steempower
2-200 are accountable for 36% Steempower
2-300 are accountable for 38% Steempower
2-400 are accountable for 38% Steempower
2-500 are accountable for 38% Steempower
2-1000 are accountable for 40% Steempower

and there is also a small thing you need to consider that can give biased data's since some whales powerdown and power up at the same time like steemcleaner

also in my research for another article on things that you think every steemit user should know I found out that most of the top 50, belong to steemit Inc or people involved in the project

except for steemit which accounts alone for 70 Million Steem Power there are many developer, if I compare it with facebook, this means that early investors and developer cashing out is more dangerous then let's active user cashing out, but in general we need to consider that everyone or so has expenses, so I would considering a big alert if 50% of the people would power down.

https://steemit.com/top50/@swisswatcher/who-are-the-top-50-richest-steemit-whales-ranked-by-steem-power