Bitcoin is now only less than 30% from its ATH. During the last bull market it took only two weeks to get from $10K to $20K. I think $20K by 1Q 2021 is very much possible.
Even Wall Street “smart money” now in on BTC: https://www.supercryptonews.com/wall-street-veterans-make-a-strong-case-for-bitcoin/
The more interesting question is, how high will it go?