“Mad Money” host Jim Cramer has warned that owning Apple Inc. (NASDAQ:AAPL) stock could be painful amid a decline in iPhone sales in China. What Happened: Cramer expressed his concerns about Apple’s stock, highlighting the 30% drop in iPhone sales in China, a key market for the company. “Apple slammed hard by JP Morgan, i-phones (sic) looking down more than 30%, I saw own it don’t trade it but owning will hurt right now.” Apple experienced a significant decline in iPhone shipments in China, with about a 33% drop in February compared to the previous year, highlighting a continued downturn in de…