I think the bitcoin price will rise faster than that. The $620 could be reach this or next month. End of year price could be $850.
It's hard to say if the price will get back to 620 or to 850 for that matter. At this moment we know that the halving is over + the price is affected by the recent hack of bitfinex.
So at this moment we can expect nothing, unless offcourse there is some good news. Which I am expecting for quite some time now, The currency market is broken and bitcoin should fill the gap where traditional currencies are leaving those gaps.
Lets hope that the price will touch again back to 600 value and it will stay at this level again..