And why are Kuwaiti's buying BTC when our currency is the top in the world? It just makes no sense to me 
The strength of your currency is not measured by the value of your denomination.
One yen is less than 1 us cent, does that mean that the yen is worthless?
Besides, your currency is pegged against a basket of other currencies so its value was chosen arbitrarily, more of a propaganda thing that actual reflection of the economy.
Another oil crisis and you will again abandon the pegging and choose a new random value.
My question is: How will BTC price increase in value if people are buying it as a store of value (as opposed to using it on regular transactions?)
Simple economic laws of offer and demand, fewer coins for sale as they are held in wallets as a store of value, less offer on the market more demand, the price goes up!
By how much, that's a different question, you need a really good crystal ball for it. If we would know how many people are planning on spending x amount on buying coins and how many plans on selling then we could guess the price, but again, that is nothing anyone would ever been able to know.