it seems pretty stable at the moment for me, sure that depends on how people think but one thing for sure is bitcoin will rise again. My prediction is it will hit 10.000$ by the end of December 2018.
Nope, it's not stable. Do you even check the graph? $10k would be possible but we don't know when, but if we are following the trend. It could be at the end on 2018, but it is just a speculation since ETF has been rejected by SEC which could bring more downtrend soon.
When the price goes down means we can use that chance to buy more bitcoins and hold it for future till the value will reach very high.