No! I don't think so. " wealthiest" is a strong word but let me tackle this one using simple math. :)
Assuming one has 1,000,000 Steem and the price of Steem increases in the next few years to what once the highest price reached by BTC of $20,000.
1,000,000 x $20,000 = $20,000,000,000
That's $20 Billion! A lot of money indeed but let us not forget the net worth of the current Top 10 wealthiest people in the world. As of January 2018:
Not even on the Top 10! And we have been too generous in our example above of owning at least A Million STEEM to begin with. So yeah! I don't think so.
Steem Users however will probably be living in a stress-free and possibly a little laid-back and extravagant lifestyle after we go moon! Go Steem! :)
I don't think that user of any network can be the wealthiest people. If someone going to be the richest person that would be the owners of that network.
So Steemit users will not be the wealthiest people because by simply blogging one can't get enough money to be the riches. However, with some investment one can be rich enough to earn a good amount money.
Steemit isn't a "get rich scheme" so I am going to say no. Maybe steemit users will be the happiest people in the world not be bogged down by YouTube admaggedons and Facebook surveillance/post manipulation.