Credit cards are the safest.
Initially, some may think this statement is incorrect, since people can obtain your CC number and make charges on your account.
However, you should realize that (at least in Canada) you ARE NOT RESPONSIBLE for any fraudulent charges that you have not approved. If you notify the CC company of this, you will not be on the hook for the charges.
Granted, it might be a pain in the ass and a bit of a hassle to rectify the situation, but it will get fixed.
On the other hand, if someone somehow gets your Neteller number/password/secure ID and takes money from your account, I suspect that you'll be SOL.