3. Fluctuating value: The value of bitcoin isn't steady as it rises and falls. The uncertainty in the price and value greatly hinders the general adoption worldwide.
The fluctuations of value is one of the things that makes bitcoin to be quality and important, if bitcoin should be stable in value it won't be serving the purpose of being a digital currency, when the prices falls down it gives people the opportunity for them to buy bitcoin and wait till when it rises for profit. The fluctuations of bitcoin is one of the quality why bitcoin is better than fiat, I don't see the fluctuations of bitcoin as a challenge to the world.