I made a prediction 6 months ago that we'd see BTC go to a low of around $2,745. If you're interested. That still seems realistic to me, but there is strong support in the range of $3,000 - $3,200. If we break much below 3K, I think $1,000 - $1,200 becomes more likely. Personally, I'll start cost-averaging into more BTC once it goes down a little bit more (anything less than $3,300 seems like a good buy-in level).
I believe you are correct about 2019 being a time of BTC accumulation. The larger markets are just now dropping off of the proverbial cliff - the global boat is sinking, even if most people don't yet realize it. In this environment, I don't see the current crop of cryptos being seen as a "safe haven" asset just yet. I think the traditional safe havens of commodities (gold, silver, etc) will see a boom before cryptos do.
It makes more sense to me that cryptos COULD be adopted as a better form of currency (since it does not have to be based on debt) when more people realize that blockchain acts as a "truth machine" in accounting practices - and then it will achieve wider adoption and take off. People in cryptos have been ready for this for years, but the mainstream isn't quite there yet. The coming pain will push more people to start considering different alternatives to debt-based currency and demand more accountability over the creation of money. At that point, cryptos will probably be seen as a better alternative or a "fix" for the FIAT money systems. The fact that cryptos can be linked to real assets will help people feel a bit more secure about them.