I just think three days is kinda money.

"declared to be the Son of God in power according to the Spirit of holiness by his resurrection from the dead, Jesus Christ our Lord"
-Romans 1:4

The cross is empty and stands as a symbol to us of the power of the atonement for the forgiveness of our sins. The tomb is empty and stands as a symbol of the satisfaction of God in taking the death of His Son as payment for sin.

Successful redemption for those in Christ is demonstrated in the resurrection, without which we are to be a people most pitied (1 Cor 15:14-19).

Read 8 reasons John Piper thinks Jesus rose from the dead.