Sending Bitcoin twice or multiple times from the same address is not inherently wrong or harmful to the security of the account. In fact, it is a common practice to consolidate multiple small inputs into a single transaction in order to save on fees and improve the efficiency of the Bitcoin network.

The public key that starts with 04 is a part of the public key cryptography used to secure Bitcoin transactions. It is not a security risk to include this information in a transaction. However, it is important to note that the public key can be used to derive the Bitcoin address associated with it, which means that anyone who has access to the public key can also potentially access the funds in the corresponding address. Therefore, it is important to keep the private key associated with the address secure and not share it with anyone.

In summary, sending Bitcoin multiple times from the same address is not a security risk in and of itself. However, it is important to keep private keys secure and not share them with anyone in order to prevent unauthorized access to the associated funds.