Having had interest for bitcoin among all altcoin, I tried to imagine if the price of bitcoin is reduced to atleast 80% so that It can be affordable, and before this is done a proper warning is sent to all the users and holders so that they can sell before time to avoid lost on their part and buy back when it is stable and relatively cheap.
The world is now digitalise where induction, orientation and serious campaign about bitcoin is prevailing but the major constraint for adoption is the price which had made old users to benefit from the system. For instance to own a bitcoin in my country is above a million naira. Where will one get this money from as a newbie. Let it not be as if there is no hope for us that are new to the ecosystem.
Who is about to spend
proper warning to all Bitcoin holders? Also, you took this scenario wrongly. First of all, it's technically impossible to send message to Bitcoin holders because such a function doesn't exist and Bitcoin is not a centralized currency. Secondly, if somehow magically you inform every Bitcoin holder to sell before the price goes down and they start panicking, then Bitcoin's price will crash to zero. Everyone can't magically sell Bitcoin at 70K before the price crashes. If there is a high demand on selling, then the demand on buying will be lower and why will someone pay, for example, 70K if you are in a hurry and more likely are willing to sell for much lower price?
If you want to buy Bitcoin at cheaper price, then wait for the bubble to bust but keep in mind that long-term, even current price is a discount.