I keep seeing all these posts that someone can hack my wallet. First I did not think that this could be done? If it can be done, how can I prevent it from happening? Does my wallet need to be online in order for them to be able to hack it or can they still hack a paper wallet?
Anything could be hacked, not just bitcoin wallets. Bitcoin wallets are obviously harder to crack than normal passwords since the length is much longer + the characters are completely random.
If your wallet is online then it'll stand a much higher chance of being hacked, however even offline wallets can be cracked using brute force methods...