Depends on how optimistic people are. They can say $20,000 at the end of 2019 , $30,000 at 2020 , $50,000 and so on..etc.

When this big price jump will happen? I wish we can tell. Even backed up by a technical and professional anaylsis won't work on determining when it will be.

My suggestion is to changed your thinking and focus on the current situation. Those speculations of higher prices in the future will just give you more confusions. Rather than to think when will be next spike, have some preparations about it now so that in case your dream price will happen few days from now, you will be benefited to it.