I think if the Democratic Party goes in a progressive populist direction, and the GOP goes in a Libertarian direction, we may see a future where voters are much more divided on class than race, with poor whites and poor blacks voting roughly the same while rich people of all races vote R for those sweet tax cuts.
Highly educated and relatively affluent minorities tend to be the most partisan and ideological minorities. A lot of this is because they tend to focus on social and systemic issues more than other minorities do. Poorer minorities have a higher chance of swinging the GOP’s way, though I think that is unlikely.
According to
this poll 41% of Hispanics earning over 75k identifies as Republican versus 27% of all Hispanics. $75k isn't very wealthy (though still quite a lot above the national average) but I don't think the figures for $150k+ or so are that different. Anyway, focusing on winning over affluent minorities probably isn't the best way to way as affluent minorities alone probably won't win you the election. I think moderating across the board (including on economic issues) would be the best answer. Less race baiting should attract wealthier minorities and a more centrist economic platform theoretically should appeal to middle-class minorities (if the poll numbers are true the biggest gains are to be made there) and it should atleast somewhat prevent the WWC staying home. This way they probably won't emulate Trump's succes with the WWC, but we shouldn't forget Romney also won 61% of non college-educated whites.
Then again, maybe recent events showed the GOP is truly lost. I'll keep my blue avatar anyway, for triggering PNM and because I still strongly affiliate with European centre-right parties (blue actually is the colour of most of the European centre-right).