Gold remains a tremendous store of value as a deflationary scarce resource. Bitcoin behaves exactly the same - the limited amount of gold, where demand grows as population grows but supply grows slower because it is a fairly limited resource barring occasional literal "gold mines" mimics bitcoin, where assuming network growth the supply curve is not changing to meet increased demand and thus the currency deflates against the dollar.
That isn't a viable or usable currency, though. Societies moved away from gold primarily because just hoarding gold in a vault was too viable a monetary strategy. Forcing transactions in an inflating money means just hoarding the money is losing wealth rather than growing it through deflationary scarcity, and when nations transitioned they saw significant economic growth as all the dead weight precious metals money started moving faster as paper (even under gold standard, every country was devaluating its currency against gold to print more, thus inflating it).
Bitcoin is a great store of value, for the most part. The Blockstream hijacking of bitcoin core, and the lack of any community movement to dealing with it, significantly tarnishes the long term potential. But having a deflationary cryptocurrency is not inherently bad - it just makes it inherently bad for day to day transactions, because the whole point of modern currencies is to inflate to pressure holders into spending it (either on consumption or investment) rather than hoard it to keep it moving in circulation.
I don't believe we actually have a good currency replacement cryptocurrency yet, because that money will take the form of something you don't want to accumulate because its monetary base expands, rather than contracts, over time to cause inflation and thus devalue the currency driving holders to actually spend it (outside volatile adoption demand that controls all the cryptocurrency prices today).
