Maybe some day the thousands dollars could be counted in smaller fractions of Bitcoins
not everyone is an early adopter like us
so many are just finding out about bitcoin, and they are from so many different countries and you may think bitcoin is worth 2000 units in USD but in some other currency it is worth millions units and 1 satoshi is actually worth something not just a fraction.
and when these people want to invest they usually think about buying 1 whole bitcoin, they still don't get how bitcoin is divisible like gold for instance.
Lol's you're having a wrong idea about this
Let's see so 1btc is worth 2000$ but in some country like Zimbabwe it is worth 10 trillions zdollars (example).
Even if a satoshi would be worth 10 000 zdollars or 1 million zdollars it's value would still be too low to buy a loaf of bread.
So it the end it doest matter if the coin is worth 10k dollars or 1 million rupees or 100 trillion yens , the problem is what can you buy with one satoshi in that country.