Opening Crimson Invasion Single Pack Blister [Dhelmise] returns about $5.74 in card value against its $33.68 price — roughly $0.17 back per dollar spent. On current prices, you lose money on average by opening it.
See every card and pull rate in SM - Crimson Invasion
How expected value is calculated — card value only, from published pull rates and daily market prices.
Crimson Invasion Single Pack Blister [Dhelmise] on TCGplayer