Inversion in the yield curve is a warning sigh, but I would look at the credit cycle first. We aren't quite there yet in the US, though EU is flirting with a recession and a slowdown is likely either way in the US overall. As a rule, you should always keep some cash on the sidelines because it's a call option on opportunities that may become available.
In terms of specific deals, I'm sure some people may be more likely to sell for lower if markets are in turmoil or the economy is not doing well. However, having looked at domains during market downturns before, there isn't that much of a link. The industry is small and the assets are not strongly correlated with global asset markets quite yet it would seem. It's basically a Frontier Market. The only exception has been correlation to BTC last year, but that relationship needs more time to be studied appropriately.