Many guides suggest using unique bitcoin addresses to receive bitcoins, what enhances the privacy of your wallet balance, and transaction history. For example, blockchain.info does it in such a way.
When I decided to learn more about paper wallets and create one for myself, I found out that there is only 1 public key to receive funds. So the question is, if it is ok to use 1 address for a paper wallet?
As far as I know, there is no way that someone can figure out your private key by knowing your public key. You should be able to publish your public key just like people do on this forum and elsewhere with no risk of losing your funds. You just need to make sure that your private key is protected and that no one knows it or has access to it. I keep that in a safe deposit box as a hard copy for a long term investment.