Nobody is safe even the FIAT money I think but for me Bitcoin is more safer than FIAT in terms of robbery, so in short nothing is safe it's just how you can safe it.
Bitcoin is growing very solid and the indicators are showing very soon it's going to the moon. Fiat is old method but bitcoin is more safer and advanced to pay there.
Fiat is actually safer for most to use. Cyber attacks are easier to be carried out than robbery in real life.
Bitcoin does have redundancy against network attacks due to the distribution of nodes that connects to it; it is virtually impossible for anyone to take down Bitcoin by attacking all the nodes. Bitcoin does prevent against doublespending fairly well and 51% attacks aren't that big of a risk due to the large network hashrates. The address isn't that safe since the ECDSA that derives the public key from the private key can be cracked, revealing the private key. It is not that big of a threat now, however.