Sornette et al. 2018 modelled it with Metcalfes Law. Fair value (based on network effect) is 4 times lower. Till end of the year it could bleed out to 77 Billion USD (analog to 2013/14 bleedout).

There are no technical catalysators. Scaleability trilemma will last for some years. In order for services like Amazon, Google, Ebay to implement it (without scaling no way)

financial catalysators are custodians + put options with certain clearing house conditions in order for hedge funds to move in to bitcoin for store of value. Right now there is only venture capital. No multi-billion hedgefunds (and there are even about 15 multi-trillion-funds) + approx. 40 trillion in offshore money (actualy costing money). There is no Chinese, no Indian and no Korean exposure.

A nother catalysator is Facebook.
If they buy something like coinbase it will bring support
For them to implement a digital currency (which they already did back in 2013 with "facebook credits") we need scaling or they will use a private DLT (which means no decentralisation at all)

First custodians are in Q1 2019 could take a while and I guess it will bleed down even further.