If you look at the history of Bitcoin, it has had several big up spikes followed by a big retracement in the past. It will be interesting to see how low it goes this time. If cryptocurrency has a chance of getting a small percentage of all the currency in circulation, I think it should have no problem having a market cap in the trillions. I don't think this is a bubble bursting, because that's more of a one off event and this is something that keeps happening. It's probably not much to do with the news either, I thought Bitcoin was worse to use when it was heading for $20k than it is now, at under half the price. The good news about the lightning network has been completely ignored. I think this is just normal price action in a relatively new and volatile market.