It is still possible, if the price starts to rise very fast as the OP says:
Basically this. It's almost as if people forget that price moved from $20K to $40K (+100%), as well as from $30K to $60K (+100%), both times within only 4 weeks. A parabolic move could occur as late as December and still comfortably achieve $100K. In both the bull markets of 2013 and 2017, we saw the end of the bull market as the more parabolic than the beginning, so I see no reason why this year will be any different.
Of course if the bull market is over, then we won't achieve $100K, but I don't see any evidence in the charts that this is the case so far. The exception to not reaching $100K by the end of the year, but still reaching it early next year, would be based on further consolidation before a parabolic move. I won't be concerned if price doesn't reach $100K by EOY basically, as long as price remains bullish.
Additionally if $70K were the top, and price doesn't go higher, then I therefore wouldn't expect an 80% drop in price or need for a multi-year bear market, as we have seen in previous cycles, as it would mean that this is year/cycle IS different. The main difference being not having a parabolic blow off top and therefore not having an enormous sell-off that would take considerable time to correct.