I think you can wait some while. Bitcoin may boost in 2018 and can hit 20k again.
If it rises over 20k, I cant see any limit.
These days are not easy to decide. On the other hand, it may down as well under 10k. But there is a huge physicological demand on 10k.
As you see the last pricing movements, price jump when hits 10k.
It is very clear that it will be hard to go down 10k.
So as a summary if you don’t want to take more risk, just wait…