I guess you mean what is cursing the rebound or the surge again, well, we expected it, the market has been sable on $8000 for too long and some big investors have probably been holding on to see if the market will dump from that value based on the speculation of some analyst that there will be a very big corrections, which is why bitcoin might has failed most of the time it tried braking more barriers.

Now that they have gotten a clear signal that the market is not going to dump again, the biggest investor may have taken the move to first invest his own capital which I expect many other investors to also follow from here, so this increase may continue as it is till $11500.