Bitcoin won't break $500 a coin, likely will sit around the ~$250 range with occasional jumps over $300 and below $200.
this is exactly what bitcoin is doing right now, which doesn't means that it will be the trend of its future
People need to start comparing Bitcoin to other payment methods, and they will clearly see why Bitcoin will never have enough demand to "go to the moon," most of Bitcoin's current users are speculators that have no clue what they are talking about.
the non speculators base is growing it just need time, the real bitcoin run started in 2013 essentially
Bitcoin's biggest issue is that is not consumer friendly: Buying Bitcoin is time consuming (and costly when you figure in fees associated with acquiring Bitcoin + risk of volatility), very slow (to reach 6 confirmations takes several hours... lately its been taking ~1 hour to get even a single confirmation), no ability to chargeback (this is NOT a plus), and other hassles (security issues, learning curve etc). The only thing Bitcoin is better than using the dollar for is to purchase illegal goods.
volatility is only a problem related to the current market cap, will be a non issue in the future, if that rise to a certain level(much higher than the one of the 1200 peak)
6 confirmations aren't a real issue you could accept pending transactions without problem(those one 1 are exception and again it is because of the price not being stable so the diff swings too much, it all come from there)
the irreversible transaction is actually a good thing, how many are evading from paypal because of that...
for you last sentence i would not say illegal goods, but i would say; at doing thing more anonymously