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What if people dont want to wait 5 years for that to happen? What if next year they want to buy a coffee with a crypto and Bitcoin price is still changing 10% +/- every day? I guess my point is since Bitcoin is used as one of the primary entrance cyrptos (used to buy other cryptos, unlike DASH or LTC) its volatility will never be as stable as some of the other cryptos are, in turn making it a less then ideal option for day-to-day transactions.

Again not saying it can't be used for that, just in my strong opinion it isn't the best choice for that use. I guess time will tell.