You can even "profit" from deflation, but the key trick is to preserve your savings. The cost of living plummeted about 1/3 during the depression. "Cash in the mattress" wasn't a bad deal compared to free falling stocks and failing banks.
Notice this story from today:
"Consumer prices post biggest decline since 2008 as coronavirus puts clamps on inflation" "CPI shows 20% plunge in gas prices, airfares post record drop"