Next natural level should be $6,000, than $7,000 and so on, what is interesting is that bitcoin pass trough some levels with incredible speed, and for some it takes time. I will be happy if we see $8,000 by the end of this year, this rise now didn`t make me so excited, you need to get use to it and not to think that every rise is a bull run that happened in 2017, we will need to wait a bit more for similar year when prices will have fast rise to new ath.
I don’t think bitcoin will follow that of 2017 pattern again, what I see now is that the Bitcoin value will continue to slowly grow as more investors comes in, the speed each month will get depends of the number of investors then and the amount they are willing to commit into the investment.
I believe that Bitcoin should grow far more than the value of $8000 you quoted there because every stage of value BTC picks, there will always be FOMO which will push it up a bit by adding extra $800 to $1200 and right now, I think most investors are really targeting the ATH and not the value bitcoin will be having this year.