"At the end of that time, I Nebuchadnezzar, raised my eyes toward heaven, and my sanity was restored. Then I praised the Most High; I honored and glorified him who lives forever. His dominion is an eternal dominion; his kingdom endures from generation to generation. All the peoples of the earth are regarded as nothing. He does as he pleases with the powers of heaven and the peoples of the earth. No one can hold back his hand or say to him: 'What have you done?'" NIV translation
The events unfolded just as the dream had shown and, at the designated time, Nebuchadnezzar humbled himself and acknowledged God. As promised, his sanity was restored and this is a beautiful promise to each of us in that, if we humble ourselves and call on Jesus, He will restore our relationship with the Father.
"At the same time that my sanity was restored, my honor and splendor were returned to me for the glory of my kingdom. My advisors and nobles sought me out, and I was restored to my throne, and became even greater than before. Now I, Nebuchadnezzar, praise and exalt and glorify the king of heaven, because everything he does is right and all his ways are just. And those who walk in pride he is able to humble." NIV translation
Many things may seem to be given up when we come to faith in Christ but the biggest thing is pride. It was only after the king was humbled that he could see God at work.
Likewise, it is only after our pride has been dealt with that we can see what Jesus did for us on the cross. Like the king, it may look like we have lost much more but God can restore more than we ever had just like he did for Nebuchadnezzar.