I too have great believe about bitcoin to be a deflationary currency but the price thing do not work the way you think.after all time high, anything can happen, and what will most likely happen is decrease of bitcoin price which is called correction, correction makes price movement healthy, and after long period again, the price of bitcoin will increase than the all time high, but it can take time for this while some wiser people will make stable coin as their safe haven during bitcoin price decrease.