Sorta-fearless prediction:
Someday, the democrat-communists are going to be in complete control of the government again (White House + Senate + House).
One way or another, they're going to push a "wealth tax" through, but probably not just on super-millionaires.
They'll go after 401k's and IRA's.
Just "a little off the top" to start, to establish the principle.
Then later on, they'll dig in.