Changing of all time high shows that the value of Bitcoin is not fixed or constant, it varies with time and season and that is why we should have the long term mindset because there is high possibility of profit in long term investment even though nothing is certain. All time high signify the highest point or price Bitcoin has attain for a given period of time and what happened years back will definitely repeat itself again because the price we are seeing now will be considered as very minimal in years coming because of the extent or height Bitcoin will attain.
I agree with you, that's why I have been repeatedly talking about investing in Bitcoin in past posts. Especially for those who are new investors, I have shown with evidence that those who invested in Bitcoin in 2013 or 2012 are the most successful today and those who could not invest in Bitcoin around 2013 are just spending time with regret. As time goes by, the price of Bitcoin has changed drastically, so when you invest in Bitcoin for a long time, this is the best time for you.
In the same situation, the price of Bitcoin will not remain for a long time, it is volatile. If you invest in it quickly, if you do not have enough money, then you can invest in Bitcoin weekly by following the DCA method. So it will be the most suitable and correct investment for new investors.