Bit coin is now rather stable. Smart investors can actually make nice profits trading bitcoin daily as it generally tends to chchange at a rate of 1 to 5 % daily as seen on btc e. But I would say that the price will be dropping as less people are saving it and more people using it for daily real life transaction.
While the price hasn't moved much in the last one month, daily volatility can be high compared to other asset classes. As you say, this is one reason why traders are able to make reasonable profits on Bitcoin.
It is relatively stable.