First of all we had a dead cat bounce in 2018, meaning that price went from around 20k down to 10k (50%) and in about 2 weeks went up again to 17k which was very close to the ATH. Then it dropped again to a strong support of 6kUSD (30% of the ATH)
Now we had a drop from 70k back to 40k, no bounce and another drop to 32k and now we're stuck in this 35-45k (around 40% down from ATH) range for 3 months.
This doesn't look similar to 2018, but I also think it doesn't have to. Who says bull-bear cycles have to look the same every time. If you look at the details they never are.
In 2017 we went up 10x from the previous ATH. In 2017 we only went up 3.5x. A bull cycle so much weaker from the last one is expected to produce a weaker bear market.
Why would it go to 10k? You're trying to look for similarities between previous markets, so be consistent. After reaching a new ATH in a cycle, bitcoin hasn't ever retraced below the ATH of a previous cycle.
When we went from 10k to 20k for the first time, the next bear market did not go back below 1k. After breaking 20k for the second time the lowest that I'd expect it to fall from the ATH of 70k is 20k with a possible wick below. Daily candle wicks are possible to go lower than the fair price because of low liquidity on exchanges.
10k is out of the question unless we get a black swan event like a nuclear catastrophe or a world war.