It is a combination of 2018+2017.
I think it looks more similar to 2016 rather than 2017. Perhaps if 2017 is to be repeated it will be next year in 2021.
I wasn't active in Bitcoin in 2016, I barely knew what it was and I joined in 2017. What I didn't experience was the change the halving created in the selling pressure.
I didn't know that and without watching the charts live it isn't so easy to review historical charts. It was an immediate stop of selling after the halving.
Previously it created a huge parabolic rise in price. Something that I don't wish for and I would prefer to have a normal and organic rise but I don't see this happening, it will probably be parabolic again.
IMO, we're seeing more of an organic rise for bitcoin. On 2017, it wasn't like this. When it has reached $19k, it has quickly dropped and never went back to that price again. This time, it has reached $19k for the first time after a couple of years then it has dropped to $16k and we're back at it again.
That's a sure sign that we're still bullish and this bullishness that bitcoin shows is part of the organic rise that it gets. Mostly, the contribution is more from the very much good news from several organizations buying bitcoin.