If 1 Steem becomes $20? Then people with Steem Power such as the thread poster will be set to retire. And $20 is a very reasonable price for something like Steem over the next year or two.
The higher the market cap the better off Steem Power holders are. If they can retire or not will seem to depend on the strength of the market cap which seems to depend on demand for Steem which would seem to increase when network size increases. If we have 500,000 people by the end of this year then $20 becomes reasonable.
This is all without the referral program which could speed it up even more.