It is most likely that we never will hit a full 960k in one day, because everyone will size down there coin blocks so that they won't hit the 1k limit....
What does this mean?
Should I resize my blocks BEFORE they hit 1000?
Just that people will create block of smaller and smaller size as time goes by. Earlier in the game, you could have blocksize of 4200 with no much risk of hitting the limit. Now, even 3600 hits the limit and 3300 is not safe anymore. Personally, I use 2400 but one day, even 2400 will be too high.
This also means more and more blocks - because there is more coins and also because there is a bigger difficulty, which encourages to create more blocks of smaller size (rather that less blocks of bigger size). The network is even more secure! See my long post about this,
inflation control and network security.
Bottom line: keep yourself informed about the optimal size at a given moment, the size other HYPsters considered the best according to their feedback.
For the moment:
- Agressive: 4000
- Normal: 3300
- Conservative: 2400