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.
Should you think that the price of Bitcoin could be reduced by anyone person or group or persons and these individuals would also be able to reach out to every individual hodlers to decide on what to do with their Bitcoin(s), I think your talking more in aspects that could be peculiar to Altcoin than would be to Bitcoin.
Bitcoin doesn’t work on any concept of price offering. Its price is what is determined by the forces of demand and supply on it. Besides, you can’t expect price to dump just to accommodate more investors who had the chance to invest but chose not to.
Rather than dumping, price needs to go up because, Bitcoin is a scares commodity and it needs to make value of its 0.0000001sat for it to serve on a world scale.