The pattern is the same as in 2017, the correction was 50% and then increased to more than 200% at the end of 2017,
and made Bitcoin hype, yes many bought it at that time including me, and until now I still hold Bitcoin, because I believe Bitcoin can reach $100000 in future/
collect Bitcoin before Bitcoin price gets more expensive
The pattern is also the same as at the start of 2018, when it corrected more than 50% and then decreased steadily for the next 2 years.
So there are two potential scenarios:
1) We're in a mid-cycle correction (similar to what you mentioned)
2) We're at the start of a longer term bear market (the scenario I mentioned)
At the moment, it's not clear which scenario will play out, but most of the technical indicators are pointing to the 2nd scenario which is why the "we're in a bear market" people are pointing out the possibility.
The people who are using a DCA strategy don't care which scenario will play out because their investment strategy will stay the same, but the people who try to time the market are considering these two scenarios closely as it will determine their next move.
Whether Bitcoin is considered "expensive" now depends on your time frame.