My prefix is a moment, my infix comes before nouns

Question

I just made this 'Riley riddle':

My prefix is a moment,
My infix comes before nouns,
My suffix is an Indian currency,
I keep you safe and sure.

What am I?
Hint 1:

Hint 2 (A very concise hint):

Stiv · Accepted Answer

I think @Kramii was very close, but the answer is probably:

My prefix is a moment,

My infix comes before nouns,

My suffix is an Indian currency,

I keep you safe and sure

Re the hints:

risky mysteries · Answer

Note: This answer was valid before, but the question have been edited afterwards, so now this answer is a bit innacurate.

Are you a

My prefix is a moment,

My suffix comes before nouns,

My infix is an Indian currency,

I keep you safe and sure

Hint 1:

Hint 2:

Kramii · Answer

Are you:

Prefix:

Infix:

Suffix:

Safe and sure:

Also:

But:

3 Answers