I don't really like to speculate because it is very inaccurate especialy long-term but that being said.
Today I was playing with graphs, lines, averages, I was reasearching history and I have came with something very close to what OP has suggested.
I think that we have just stepped into Bear market and we will be there for the next 2-3 years until we start to see progress in price action.

We have to remember what a crazy run we have had in 2017 until 2018. Market needs to take a break and settle down. People need to recover from all that hype, ICOs, and high emotions. Whales have left the Bear market in search for new profits instead of sitting here, making losses while HODLing. Smart traders don't like to have funds sitting around doing nothing.
If history repeats by 2022-23 we could see new ATH at around 120k. (very rough number) It is so difficult to know with crypto because everything is still so new and potential is enormous. Imagine when we will look at 20k ATH chart and compare it to that from 2014 which now looks barely visible on chart.

I hope that I get suprised like I did when BTC surpassed 10k.
Whatever happens I love BTC and blockchain because it is unique. I was using BTC since almost early days because of it's technology and this is why now I feel confident about it's future.

EDIT: I am saving this post so in the future we can all have laugh at it.