The price of coins is not stable in price value, it's the happy moments to reach the goods price.The confirmation times are crazy and the price volatility is horrible. I mean, who wants a currency that on one day you could use.Most of these coins have little to now value, save for Ethereum which is actually used to build other coins and crypto kitties.
Well I dont know which coins are you referring to while saying the confirmation time is crazy, cause as far as I know, the transactions takes place in minutes in crypto currencies nowadays and also in some its just matter of seconds. I dont think volatility is a horrible thing for crypto currencies and its holders.
Volatility is in fact a blessing in disguise. For you, it might be horrible, but for some of us that are good in trading, its like a blessing to earn significant profits from time to time.