If we keep following Bitcoin's log regression channel, and with the theory of lengthening cycles (or 4 years cycles), then 2023/2024 will be the peak this time. Maybe 100k to 350k is the top. You this crazy range I just gave because it is hard to predict. Previous historical data shouldn't predict the future necessarily, but this is my guess! Again, not a financial advice, just an opinion.
Short term, no one can predict where the market is going. Can Bitcoin go lower? Yes. I like to look at macro-scale. Remember it is a risky and speculative asset still. All traders have no idea about the future, so don't trust anyone. Make your own decisions.
Regarding Bitcoin being not efficient, I agree that it is for now. I am positive we will find a solution one day to how we best mine Bitcoin. Remember how the internet started with modems, your first mobile phone, etc. Technology improves over time. I believe in this.
Finally, I am bullish on both Bitcoin and Ethereum.
If you like what I just stated, follow my Twitter (@CryptoCatPro) as I post there more often and I rarely post here.