will bitcoin continue to rise at the end of the month or it will have a sudden drop?
The price will definitely go up further in the near future. Most of the bitcoin investors won't sell their bitcoins at a price of 650-700$. It is just more attractive to hold them.
I believe the price will be trading between $640 to 680 in the next few weeks, then it will rise to $720.
i might start buying myself some coins when the price goes to $500-$520 if it indeed turns out to happen (which i don't think). i realistically think it won't go below $600 as that level will get supported. having that said, if the price goes below $600 then it will stay below $600 for quite some time. i just hope it won't happen as it took so much time to get here.