March 2022 US inflation 8% vs Thailand 5%. If you receive USD and live in Thailand, you're ahead (but avoid foreign food imports). Especially if you receive COLA adjustments to US incomes/pensions/social security.
The effect of a US "crashing stock market" is relative to the degree of investment in the market. Low to zero investment will be unaffected by a crash.
Note that a typical plunge in the US stock can lead to explosive economic recovery. An attentive and proactive stock market strategy (ie., short/long positions, diversification) might minimize immediate market losses and take advantage of undervalued stocks.