It seems strange to me that bitcoin has become so stable all of a sudden and for such a long time (in comparison to the last couple of months).
Can anyone explain this? Is there some form of manipulation going on?

Can you explain what makes you think it's stable? How can something be considered truly stable, when you have no volume and every time we get volume, there's no stability.
Well the price is not swinging profusely as it was following the crash. I thought I made that clear in my post where I said - in comparison to the last couple of months.
What do you thinks happening?