As long as these cracks remain, I also doubt we will see much dynamics. It will put more pressure on to solve scalability even more, which I believe is possible. When solved, we can see similar dynamics as in 2017 again.

I think that if it falls down, a lot of people will want to buy cheap => rally => even more to buy because bullrun => 25k$ at least. That's why some downtrend to 10k$ could be really good for btc.
Or it will just go up to 25k$ in a few weeks, then something will happen that will make it go even higher, some tech or some new use of btc (nasdaq, amazon or any other kind of thing that bring money into the system)

Most of these issues are because most of the exchanges like coinbase have yet to implement segwit. In coinbase they are not using batch transactions either. Just by Coinbase doing this it will cut congestion on the bitcoin network dramatically . Next year at this time we will be complaining why coinbase hasn't opened a lightning channel. All of us bitcoin users need to apply pressure to these exchanges. I'm personally looking at bitflyer here in the US to by bitcoin with fiat as coinbase is a failure as far as i'm concerned.

Personally I think Dash will steal the torch from BTC. Everything about Dash looks a lot like what BTC was at the beginning of the year. Dash has an on chain lightning network with 1.3 second Tx and they are on their path to 400MB blocks.