[unboxed_type]

When you have a need to establish some business procedure between different parties that do not trust each other, smart contracts might be very useful. No other database is able to provide guarantees/features comparable to the public blockchain in that respect. A trust model of most modern databases just do not comply with "everyone trusts noone" principle.

About relying on Intel SGX. Yes, blockchain oracle to be trusted needs to be run in some kind of protected environment. So what? It doesn't imply that technology is useless. I would say, we have a synergy of different security technologies to get really impressive results.