Well I suppose that's a way to look at it, I personally look at it that all of them are great and special, but I would agree David in many ways protected way more than a billion Christians, if God had not been with David indeed things would look a whole lot different. Same especially with Abraham, I mean heck, then we're not even just talking about the Christians but entire races of peoples. Indeed God did say Abraham's descendants would be beyond number like the stars of the sky, and God's promise held true, Abraham is a great example of the faith for he believed it while yet he was but only one man with a barren wife. However, I think perhaps by reading what David and Abraham either said or wrote themselves that they both then looked forward to the day of Mary and the conception and coming particularly of the Messiah Jesus. They all prophesy for the first Christmas and yet in their time obviously it is before the first Christmas, but then that just proves their great faith in God and his Promised One all the more.
So yes indeed you are correct God is the ultimate one that deserves faith, and with God nothing is impossible, many times God uses even the lowliest of people to do great things. It is rather very thematic throughout the Bible even, for nothing is too great for God.
I think that brings us to whether or not Mary hears prayers, I mean I personally don't know, I have never prayed to Mary, nor am I catholic. I am limited in what I can answer to you for why catholics do this or that thing. I can only tell you in truth what I have seen and heard from catholics, but I cannot tell you what it is like to grow up or be a catholic for I am not one.. However it's possible going by just the Bible as I do to make a fair argument that if God wills it, then sure Mary could hear prayers. I think that's the point of the next few verses in how God is great and magnificent and is able to do all things, great and wondrous things to save Israel:
Luke 1:49-56
[SUP]49 [/SUP]For he that is mighty hath done to me great things; and holy is his name.
[SUP]50 [/SUP]And his mercy is on them that fear him from generation to generation.
[SUP]51 [/SUP]He hath shewed strength with his arm; he hath scattered the proud in the imagination of their hearts.
[SUP]52 [/SUP]He hath put down the mighty from their seats, and exalted them of low degree.
[SUP]53 [/SUP]He hath filled the hungry with good things; and the rich he hath sent empty away.
[SUP]54 [/SUP]He hath helped his servant Israel, in remembrance of his mercy;
[SUP]55 [/SUP]As he spake to our fathers, to Abraham, and to his seed for ever.
[SUP]56 [/SUP]And Mary abode with her about three months, and returned to her own house.
Lol well that's not a bad outlook on being a billionaire I suppose! Also a savvy one might point out to me and reprove me that Jesus actually did a similar miracle as to that all ready when Simon Peter pulled the money out of the mouth of the fish. Either way though personally I think all the money in the entirety of the world does not even match say the miracle of raising Lazarus from the dead or even a less grand miracle such as say rebuking the storm, but that's just my opinion, I could also be wrong lol, to each their own opinion and to each miracle its own sort of glory I suppose.
As for before then as you asked me if I would bless you with a billion dollars, then as you have said to me here about what a billion dollar blessing is worth to you, then let it even be as you believe and may the Lord bless you according to his will.