I would say in an increasing secular and atheist society...Yes.
There are those who perhaps straddle the fence between not knowing which is true,evolution or deism.Even though i may not be one to set an example i can at least offer some insight as to arguing the exsistence of a God. Prophesy is a good tool for such at least for those who arent so reprobate minded and are more open minded to possibilities. If im wrong they lose nothing, if im right and they dont believe they lose everything. If this would help someone from perishing then its a victory for them and God.This a good enough answer?
How does it protect God? I understand your providing witness and leading one or more to accept salvation but I don't know how that protects God? From who?