There is no such thing as "must" in markets, not to mention that conditions of the whole cycle has to be the same for the same thing to repeat.
Bitcoin market and market makers don't have to satisfy anyone in the market which is zero-sum game and there are winners and losers with profit and loss. Intelligent and experienced people will do right things, then get profit, the others do bad things and get losses.
Take a look at those numbers again:
Highest Lowest
I halving 26.15 2.24
II halving 1132 165
III halving 19345 3232
IV halving 67549 15760
V halving 124748
Check the rise in each cycle compared to the previous "high"
$26 to $1132 -> 4253%
$1132 to $19345 -> 16988%
$19345 to $67549 -> 249%
$67549 to $124748 -> 84%
Since the rise is tiny compared to previous cycles, you cannot expect the drop to be as big as before. So the drop "must" be tiny as well.
Some different prices between yours and this one but it's not too important. The important is ROIs become smaller with cycles.
Source is from
ChartsBtc.If we can have strong belief in Bitcoin, actually DCA bitcoin with time, and hold it well over time, we will have profit. 5 years of holding bitcoin is like a time for guarantee of profit.
http://hodl.camp/