its because people putting money into bitcoin upon greece news.I myself believe they should wait for some time to see real influx of money coming from greece and not react to such news spontaneously.
This. The problem is that it's much easier to make bitcoin drop than it is to make it rise, in my opinion. If a dumper comes, idk, there might be a possibility that he'll scare the potential buyers away? People getting excited but it might not have an actual direct effect at all, its currently just the drama making the chart dance.