It could be quite a while until we see BTC reach those prices again. Firstly we will need to have more clarity in SEC regulation as well as less concern over exchange hacks and price manipulations.
The next spark for the bull run will most certainly be something related to a Bitcoin ETF (Exchange Traded Fund) which will allow institutional investors to get into this space while being financially protected. This ETF will hypothetically store funds in cold storage and allow some level of insurance. There is too much uncertainty and confusion in this space right now for traditional investors to have confidence yet.