Hello everyone! This is my second post. Thanks for hosting this forum where I can learn more about bitcoin.

First question - is it safe to give out the wallet addresses like I see in signature lines here and used for the purposes of drawings and donations?

Does this put the security of said wallet/bitcoin address in jeopardy?

Lastly, in coinbase, it seems each purchase of mine has its own identifier and its own "bc address" which, if I am not mistaken, is a wallet identity hosted on the coinbase server. Are these the numbers that others can send bitcoins to in drawings and rewards seen on this site?

-Triple T