The last ATH was $64k and the current last price was $19k. There seems to be a -$45k reduction. Of course, the reduction is extraordinary, and the bitcoin crash for 1 year has made many people start to clean up and start buying bitcoin for the long term.
The bitcoin price of $19k is a low price, there's no harm in buying at the current price, but another crash is possible. Be prepared with spare money that you still have, of course, it will be very helpful to buy even cheaper. Buy and hold for the long term, Bitcoin won't disappoint, ATH $64k might be a very low price in the future. Do your research, manage money well, and find out your best strategy.
Last year's ATH was at $67k in November, I remember it and now we're at $19k, which is a normal drop since we're in bear season, past bearish cycles may have been worse than the present. No one can be sure if bitcoin can crash further but $19k is a pretty good price to buy in. As long as we are patient with bitcoin, bitcoin will never let us down, I believe this is the last time we can see $19k of bitcoin. Just one more bull cycle and we will have to buy bitcoin at much higher levels than we are now.