20000 is indeed an important milestone in the Bitcoin history, but I am confident that this is just the tip of the iceberg. BTC is an asset that is here to stay. A viable replacement for Gold as a proof of value and of course as a mean of payment.
As we think that currently the movement of bitcoin has reached a peak higher than the estimated 20k, of course the next target of 30k is not impossible. However, it is true that the movement of bitcoin is likely to fluctuate less with a downward movement, this is because there is a correction that can occur when a new ATH is obtained.