From a technical point of view Blockchain can be regarded as some kind of a special storage system. It is much slower as for instance a replicated database system, however due to the P2P architecture the availability can be actually higher as at a replicated database. Certainly the 'hacking resistance' is much higher at a Blockchain solution as with other solutions, and of course a Blockchain is far less efficient (Figure 1).
Figure 1. Blockchain as a storage.