John Calvin provided his readers a great reason to study Daniel. He explains that in the Book of Daniel, we can see:
"How God proves the faith of his people in these days by various trials; and how with wonderful wisdom he has taken care to strengthen their minds by ancient examples, that they should never be weakened by the concussion of the severest storms and tempests; or at least, if they should totter at all, that they should never finally fall away.
For although the servants of God are required to run in a course impeded by many obstacles, yet whoever diligently reads this Book will find in it whatever is needed by a voluntary and active runner to guide him from the starting-post to the goal; while good and strenuous wrestlers will experimentally acknowledge that they have been sufficiently prepared for the contest."1
Because the Word of God is eternal, you and I can find the same thing in a Book of Daniel Bible study today.
"There is a God in heaven
who reveals mysteries"
2020. Christian Standard Bible. Nashville, TN: Holman Bible Publishers.