But I think if 100$/BTC the price is only getting down, not getting higher
I bet that the price of bitcoin will don't go never at that price. 100 us dollar is to low and if the price was not at that amount when began the lowering about one year ago will not go on. Bitcoin are going to be stabilized in the range 250-300 us dollar one and the probability are that will be increased slowly but surely. We are hoping that bitcoin are going to stabilized and matured as a currency.
Yes, the 100$ range will never hit again, fortunately but I do have my doubts about the 200$ mark. I have a feeling that btc will go really low after a couple months and cause people to panic while others jump on their final train. And after that if things go down as we intend them to be, then I think with more acceptance and support, the btc community can really expand and hit 300$ + mark permanently.