With even the SP500 being super concentrated in AI-exposed companies, probably a combination of bonds and foreign equities. But hedging does mean being OK with watching any (perceived or real) bubble madness continue. I wanted to put all my wealth into Apple circa 2005, but chose not to because blah blah blah diversification. Obviously I wish I did, but I'm ok with the perfectly sensible decision I made - and I'd be retired many times over had I done it.

Personally speaking, as somebody that was 100% in equities until earlier this year (I'm in my early 40s and had most of my wealth in VOO), I shifted to a 60-40 portfolio - there are ETFs that maintain the balance for you. I did this knowing full well that this could attenuate my upside, but I figured it's worth it than being so concentrated in a single part of an industry (AI within tech) and so much upside was already acquired up until that point. Also, I figured the chances of the 2nd Trump term adding to volatility weren't going to help tamper volatility. On top of that, my income is tied to tech, so diversifying away further from it is sensible (especially the equity parts of my compensation).

But if you're in your 20s, your nest egg is likely small enough that I'd just continue plugging away in automatic contributions. Investing at all is far more important than anything else at that stage.