Do not define consistent growth with volatility. As Bitcoin is getting more valuable in the eyes of more people, its price necessarily must grow. If it doesn't, it means only one thing: everyone bought (or didn't buy) all BTC they wanted and not much trade is happening.

Draw the trend line and see the variance of 2-day average around that trend. The volatility is silly compared to how much you can gain if you invest early.

By "volatile" do you mean "growing" here? Because that's very expected when more people are getting Bitcoin. Bitcoin's potential is probably millions of dollars per Bitcoin. That will only happen if a lot of people use it.

That's because many of the people entering the market are speculators, not users.

the larger the price per bitcoin the lower the volatility, over $100 and a $5 difference a day is 5%, if/when BTC reaches $1000 then even £10 variation a day is only 1% and is much easier to account for.

maybe we should define volatility...