The greater issue of BTC is the odds between hording speculators who "believe" the "rarity" of Bitcoin will increase the market price. Currency should be predictably stable as a medium to facilitate exchange of other goods and services. Currency should also be encouraged to recirculate back into the economy, rather than sit around doing nothing.

There's also a huge issue of people dedicating effort to form price manipulator syndicates and HFT bots within the cryptocoin communities [1]

[1] https://news.ycombinator.com/item?id=7126153