FOXY
Simplify Currency Strategy ETF
stock NYSE ETF

First, I agree with everyone else about how a bubble bursting isn't a huge deal for you at your age. You don't need to try to time the market.
As for how to create a portfolio that can withstand a bubble bursting, and I'll keep this general, not just aimed at AI, but shift investments away from the bubble. Quality assets exist away from any bubble, and no serious person is going to grill you if you have a tilt toward healthcare, financials, or ETFs like SCHD.
You might not outperform the market, but you'll be safer.
Consider a barbell strategy. I know I run a fairly aggressive strategy in my Roth where I have a core of VOO and VXUS, but then have an aggressive side of XBI and GNOM, and well as several more safe holdings to balance that, as well as using options.
You can also consider uncorrelated things that won't really move much with the bubble, or even necessarily with the market. I have a small position in FOXY for this, but there are options out there beyond that.
I would note that if you want to carry a solid base of a broad market fund, you're very likely getting in on a bubble because bubbles grow, so tilting away from a bubble risk would make your portfolio more complex, since you're likely taking more more satellite positions.
Measure how active you want to be and the risks involved with underperforming due to your tilts compared to the risk of any bubble you feel may burst. Because I can guarantee you'll predict more crashes than will happen, and opportunity cost isn't the worst price to pay, but it is a price to pay.

First, I agree with everyone else about how a bubble bursting isn't a huge deal for you at your age. You don't need to try to time the market.
As for how to create a portfolio that can withstand a bubble bursting, and I'll keep this general, not just aimed at AI, but shift investments away from the bubble. Quality assets exist away from any bubble, and no serious person is going to grill you if you have a tilt toward healthcare, financials, or ETFs like SCHD.
You might not outperform the market, but you'll be safer.
Consider a barbell strategy. I know I run a fairly aggressive strategy in my Roth where I have a core of VOO and VXUS, but then have an aggressive side of XBI and GNOM, and well as several more safe holdings to balance that, as well as using options.
You can also consider uncorrelated things that won't really move much with the bubble, or even necessarily with the market. I have a small position in FOXY for this, but there are options out there beyond that.
I would note that if you want to carry a solid base of a broad market fund, you're very likely getting in on a bubble because bubbles grow, so tilting away from a bubble risk would make your portfolio more complex, since you're likely taking more more satellite positions.
Measure how active you want to be and the risks involved with underperforming due to your tilts compared to the risk of any bubble you feel may burst. Because I can guarantee you'll predict more crashes than will happen, and opportunity cost isn't the worst price to pay, but it is a price to pay.