How much and How many with Money [duplicate]

When Money and Rupees are countable nouns why is "Much" used with them instead of "MANY" when asking a question like:

How much money do you have? or How much does

The noun "Rupee" is countable, but the noun "money" is not.

For example: If I have 10 Rupees, and someone asks me:

"How many Rupees do you have?"

I can say,

"I have 10 rupees." Because Rupee is a countable noun.

However, if the same person asked me:

"How much money do you have?"

I can say

I have 10 Rupees.

But I cannot say,

"I have 10 moneys." Because money is not a countable noun.

Another way to think os this is that we can speak about countable and uncountable nouns in quantitative terms, e.g.

I have (no)/(a lttle)/(some)/(lots of) money. (or Rupees)

And we can speak about countable nouns in numeric terms, e.g.

I have 2 Rupees (or 3 Rupees, or 150 Rupees, etc).

But we cannot speak about uncountable nouns in numeric terms. e.g.

We cannot say, "I have 2 moneys (or 3 moneys, or 150 moneys, etc).

• Actually, you can say moneys (or monies) in a specific context—although not in the examples you give. But even though it does have a plural form, it's still not countable. – Jason Bassford Jun 30 '18 at 4:53
• @Jason Bassford Agreed. I thought about discussing moneys/monies, but I felt my answer was already long enough given the nature of the question. – James Jun 30 '18 at 5:02

Money isn't a countable noun. Rupees is. So, you say how much money but how many Rupees.