I see the opportunity to buy btc and hold it as being a good opportunity, if you are willing to save your coins for at least one year.
There are other investments such as altcoins and icos. It's rare to find a profitable one, but it's worth keeping an eye out.
Yes, I have the same opinion, bitcoin price will keep fluctuating for some more time and it would be a wonderful opportunity for the long-term investors. One can buy bitcoins through systematic investment method which recommends placing small purchase orders within frequent time frames. I believe bitcoin price will get stability after the end of next year and then it will increase at a sustainable rate so there is an opportunity for those who would like to buy a large amount at a comparatively less risky rate.
Personally I disagree with your comment about bitcoin reaching stability, the world economies are not in the best shape and with the election of Trump changes will come, so I don't think we are going to see stability any time soon, that by the way is not bad since we could get a bigger price increase.