1. the main' value of bitcoin is it peer to peer and put out the middle man like banks/governmnets/paypal and bunch other from the chain,
and we can send and receive money directly... this kind of tech bring huge value to human kind relative* because everything is relative and peer to peer money(denetralized tech) have huge value compare to cenetralized money eco system.

2. bitcoin and other low supply crypto is store of value like gold and diamonds but have much more less supply, and compare to gold and diamonds which is must to convert to some other value(fiat cash) in order to buy clothes,cars,houses and other which mean the selling rate of gold and diamond always will grow in some sort of level because its store of value and not accepeted as cash anywhere...

selling rate == this is what make market movements in crypto , which mean if the selling rate is high so *x* lose value.

now bitcoin/crypto (low supply) its store of value like gold/diamonds and cash in the same time which mean soon the selling rate of crytpo will fall drastically because it will accepeted everywhere and people will not convert crypto to paper money they will buy directly and this kind of effect when the selling rate fall because of adaption its surge the price per coin without even demand grow, simple because selling rate fell

bitcoin/crypto == store of value + cash

...