Right now the price of Steem is around $1.5. In my opinion the price of Steem is very cheap and could easily be $10. At $1.5 100,000 Steem isn't much of a nest egg for the typical US or UK citizen. On the other hand at $10 that 100,000 Steem could be worth $1 million and at that point it becomes a respectable nest egg/retirement fund. According to some estimates it costs around 2.5 million to become financially independent and be completely indefinitely sustainable by the 4% rule.
So this would mean perhaps 200,000 Steem is all anyone will ever need to guarantee themselves a comfortable retirement if the Steem platform can last and evolve through the years. Considering how long Reddit has lasted I do at least think it's possible that Steem can last 5 more years. 200,000 Steem might be all anyone ever really needs in the form of Steem Power. What would really be cool is if somehow the developers can be convinced to add "interest" back on Steem Dollars and or Steem Power but this is likely not going to happen.