1 LP token could represent 1 XYZ and 1 BNB, meaning XYZ has a rather high price tag. However, if a large amount of XYZ are sold to the pool, the LP token may represent 100 XYZ and 0.01 BNB: this would mean that 1 XYZ token has practically no value anymore: the liquidity pool was drained. The amount of locked LP tokens remains the same and are still locked, but their value is extremely low.