The bitcoin price has been stable through out September 2018 and like you said is like a build up for bullish trend and we should not hesitate to invest now and makes money in future. Cryptocurrencies market is going to recover but it might not be like it was in 2017.
We are now at the last quarter of the year and we still didn't see any big pump and been almost stable at the price of $5k-$6k. With so many things happen for the last 3 quarters, still cryptocurrencies continue to fight to stand still.