does anybody know that what to do with free wcx I earned ?! can I send them to a wallet or something ?!?! If so, how ?!

WCX? What is that and where did you find it?

https://ico.wcex.co
there were announcements about it and I joined and earned 150 wcx but I don't know what can I do with them !

[off-topic] Sorry buddy, but this looks to me (personally) like a bad ICO... I would suggest following these for possible updates:
https://bitcointalk.org/index.php?topic=2026078.2600, https://bitcointalk.org/index.php?topic=2107078.20, https://bitcointalk.org/index.php?action=profile;u=1070194;sa=showPosts
If you want something more promising, follow my signature. U can still join the signature campaign and earn BTC rather than new coin, if you join before Dec 10th: https://bitcointalk.org/index.php?topic=2494912
Good luck!