The current peel value of a 1 BTC Casascius coin is more than 1.22 BTC.

Here is an easy tool to check:
https://bitcore.cc/checker.php

This tool doesn't include all the forks/clams/etc or the amount would be higher. It credits the Bitcoin Diamond at 1:1 when it should be 10:1 so you have to multiply the Bitcoin Diamond amount listed by 10 to get an accurate calculation. You might also keep in mind that the Segwit2x fork is right around the corner with a current futures value of $270 each.