It might happen when institutional investors will come to this market.
They are game changers and they will affect market with a huge purchase volume.
When some big events occur again, they say in next halving together with ETF approval can lead to another 2017 ATH hits. Though it will still depend on the situation of market.
fluctuations were also influenced by the SEC's attitude that was different than last year because it could hamper the development of bitcoin prices, delay worse than approve / reject, and their attitude made speculators still reluctant to buy bulk. ETF is also one of the important factors for at least we can expect prices to rise.