user12846: When running (btc-/ltc-/whatever) wallet as daemon, I have to set "rpcuser" and "rpcpassword".
There is the option "rpcallowip", it is recommended to have this value very strict, e.g. "127.0.0.1".
I cannot see any danger setting this value to "..*.*" - if anyone guesses my server and credentials, he/she is welcome to mine for my wallet.
So, is there any danger opening rpcallowip?

user12224: 
if anyone guesses my server and credentials, he/she is welcome to mine
  for my wallet.

He/she can also call all other RPC commands. For example, sendtoaddress. So, if your wallet is unlocked you can loose your coins.

12846: <p>When running (btc-/ltc-/whatever) wallet as daemon, I have to set "rpcuser" and "rpcpassword".</p>

<p>There is the option "rpcallowip", it is recommended to have this value very strict, e.g. "127.0.0.1".</p>

<p>I cannot see any danger setting this value to "<em>.</em>.*.*" - if anyone guesses my server and credentials, he/she is welcome to mine for my wallet.</p>

<p>So, is there any danger opening rpcallowip?</p>
 12224: <blockquote>
  <p>if anyone guesses my server and credentials, he/she is welcome to mine
  for my wallet.</p>
</blockquote>

<p>He/she can also call all other RPC commands. For example, <code>sendtoaddress</code>. So, if your wallet is unlocked you can loose your coins.</p>
