[wilkommen]

I would say if you're holding a lot of money in a S&P 500-tracking index fund, switch to holding a total stock market fund instead. It's probably a bad time to hold SP500 right now, but you don't want to get out of the market entirely because there's no way to know when the bubble pops. So hold a total stock market fund instead, so that you don't have an outsize amount of your portfolio invested in the companies leading the SP500 (which are the most likely to lose the most when the bubble pops).

[tempestn]

I agree with using a TSM fund rather than an S&P 500 index, but be aware that you're still mostly holding S&P 500 companies. The S&P 500 covers about 80% of the total market cap of US public companies, whereas the Russell 3000 is 98%. (This is, of course, because the 500 largest companies are so much larger than the median.)

If you really want to diversify away from the biggest growth companies you could try a value and/or small/value tilt. Those might all be good advice, but they do come with their own caveats, whereas using TSM instead of an S&P 500 fund is just good advice in general.

[wilkommen]

Wow I did not know that. I might switch to something weighted/tilted differently.