Almost certainly yes, but the future is impossible to predict. Some other blockchain could always come along and dethrone Ethereum--perhaps one where multisig wallets can't be nuked from orbit by random third parties.

But to help reasure you, for like half a year, Eth was stuck in the ~$10 range, but it broke out eventually. We're seeing a long consolidation now on the tale end of the ICO boom. Once more dAPPs start going live, you'll see increased demand just from network value, and the price will be under continuous upward pressure.