i believe they were aiming at 300 since the beginning, but they pumped more to get some fish in and suck their little badget
if we hold the 300 at least it should increase again in the future to 500
300 is a psychologically important level. If the price stay around $300 for a few months, then the push to $500 or even higher is possible.
If the price will remain at 300 us dollar I think that it is not a big achievement. It is only to have the possibility to tell that the last increase was not like the normal ones did by bitcoin during all its story. But a little better. But just a little is not something important. The beginning price before the increase reached that amount two or three times so it is not a big thing if it will be stabilized there. It would been another thing if would be remained around the 380 us dollar as it was for 4-5 days. In that case we were able to tell that bitcoin has made a step ahead; as a currency and as a hope for the big future wondered by all of us.