Bitcoin has a 21 total of 21million coins that could ever be produced.
That's 2,100,000,000,000,000 Satoshis (
BTC0.00000001).
If that ever becomes an issue then a soft fork can add more digits.
This is a non-issue.
If bitcoin's had to be traded in whole coins, than yes this would be a huge problem. But of course this is not the case. Perhaps the conventional unit should be made the mBTC which would make a unit worth about .45 based on today's prices, but the number of coins is not a problem.
As others have pointed out, it's a non-issue with the numbers.
I think the bigger problem is their lack of distribution, and if there will be a "Bitcoin 1%" forever. But that's another topic for another day.