Lisk has not been able to break through the $8 resistance for a long while now, we have hit this mark around 3 times already and it seems to follow a pull back each time as there is too much sell orders being placed. However, once we do break through this psychological barrier (Which I believe will be the 4th or 5th run up) we could see Lisk being $10 -$15 in the medium term future.
Keep in mind there is an upcoming project such as the SDK, which will attract a lot of attention.