Any safe can be unlocked.
It all depends upon professional skills of a specialist, his toolkit
and time given.
It's very doubtly to think that a professional
thief will be trying to unlock your safe. Mostly it can be a local
hooligan, drug addicted one or an alcoholic who would try to realize
house-breaking in the pursuit of money or jewellery. A safe can
help avoid the consequences of such "visits", because
a non-professional is simply incapable of unlocking it.
Correctly chosen safe will be useful just right
in this case.
What
is the use of a domestic safe?