People like to call it 'hedge against fiat inflation' others said 'it's digital gold'
None of it is true. In fact it is misleading. Bitcoin inflates twice as heavy as fiatmoney until 2016 - after that it'll continue to inflate at the same rate as fiatmoney. So how can that be a hedge against inflation or compared to gold? It's a lie.
Bitcoin is inflating heavily with around 10% per year. This is causing negative feedbackloops like we see now and causes high volatility.
The high inflation in bitcoin also impacts adoption in a negative way. People will probably not adopt something that goes down 90% of the time to make a crazy rise (maybe) at one point for a few weeks and then starts declining again for ages.
Sane people will not adopt that.
Bitcoin's money supply increases - yes. But gold "money" supply also increases, because every day new gold is unearthed and put into circulation. The key for both being valuable is not zero increase in money supply, it is a
predictable low increase in money supply. The essential point is, that neither Bitcoin nor gold can be deliberately inflated at will.
If you look into the future, you'll sure notice that Bitcoin's money supply will diminish over time and there will never be more than approx. 21 million coins in circulation. Around the year 2050 (or even earlier) you can be pretty sure that the number of new coins put into circulation will be outmatched by the number of lost coins. So by this time Bitcoin will be truly deflationary in regard to money supply.
High volatility will go away with growing market capitalization. Besides, volatility is currently measured compared to USD, which will be unimportant like any fiat currency in future (destruction through hyperinflation). It's possible that in future all goods and services will direcly be quoted in Bitcoin only.
ya.ya.yo!