An interesting day yesterday - all the coins I track and/or have a stake in had an upward take-off: BTC went from US$2337 to US$2839 (it's back to US$2668 as I type) - a twenty percent move; LTC and ETH were around ten percent. It appears it was triggered by inrush on BTC because of a SegWit milestone being passed, although various commentators point out that problems may still arise. I ended up shuffling a few assets to catch the differential in BTC; but what goes up may well come down even faster. I suspect that the market was poised, and various traders rushed in. It will be interesting to see whether the tide drops again, or whether a new bottom is created.
