Why doesn't it go back down? Well, once you've invested, there isn't much reason to sell. Your investment went up by some N multiplier, and as long as most people feel the same way, your multiplier is safe.
This explanation sounds too simplistic to be true, but whenever you look at the chart, the data seems to suggest it's plausible:
http://i.imgur.com/OU6me1N.png
Notice the volume was completely flatlined up until a huge purchase in March 2017. That massive purchase kickstarted that 50x factor.
These dynamics are independent of any particular coin. So yes, it's true that CoinDuJour might offer some benefits and unique features. But that value proposition is secondary to the overall investment dynamics at play here. It almost doesn't matter what the coin does. As long as it does something different and it's stable, it becomes an attractive target for speculation.
There are a massive number of people with spare ETH and BTC to throw around. They all want to park it somewhere that earns them money. See Pinkapp for a strange phenomenon:
https://news.ycombinator.com/item?id=15153586
https://news.ycombinator.com/item?id=15151292
After they posted that comment, I've been lurking their slack channel. A bunch of people have come in trying to invest in them. So if even pinkapp can generate a >$1M "series A" when it's straight-up illegal, it's clear there's a lot of investment energy floating around.
That's basically definition of a bubble. 'as long as most people feel the same way, your multiplier is safe'? So basically your multiplier might go away at any point.
Hedging, hedging, hedging. There are enough derivatives in the coin world to have a pretty decent portfolio growth, if you're willing to manage it and deal with the tx/transfer fees
My argument merely goes: if you threw away some marginal amount of initial (real) cash at something, and for some reason that something paid you back in full, with bonus and interest, then the price can tank as much as it wants since I'm cashed out.
From there I don't care if 90% of the unit price is pure speculative pressure, as long as I find a counterparty for my trades.
Does this make sense to you, if not why?
The main issue IMO isn't settlement speed but the ludicrous exchange fees. If you're willing to put some work in I reckon you should be able to "manually" find counterparties for the major altcoins, but to my knowledge there are no decentralised exchanges that offer reasonable liquidity.
The amount of liquid ripple is much smaller than the theoretical amount.