The stock is more than 75% off its all-time highs.Block (SQ 2.69%) investors have had a difficult few years, with the stock falling more than 75% from its highs set in August 2021. With the stock so far down, investors who are bullish on Block might wonder if the stock is in value territory at recent prices under $70.Let's look at a few things investors should consider when determining if they should buy Block shares at today's prices.Block owns two primary businessBlock operates two main business es. One i ...