More likely 18 months low, since the last time bitcoin climbed to $20k was in December 2020 and ramped up to ath at more than $67k in November 2021.
Considerable occurrences that happened this year such as the great fall of the Luna coin that raised concerns for many investors and governments, the Fed increasing interest rates, and the inflation rate increasing to 8.6% in the US which definitely has impact on the crypto market.
The time has come for bitcoin to re-enter the cycle that has fluctuated quite a lot, the price may hit the lowest at $17k this month but eventually will increase, don't panic selling and keep hodl.