Block chain is a store of value. Even if your coin is not currently improving it is still a store of value. Sum coins being more volitile than others. It ur research on what coin to invest. Bitcoin is the first digital gold used as a store of value. Then there are alts who might be less volitile.
Well this does not apply to all Blockchain or all crypto currency
Why ? Because there are several tokens that are useless and is not a store of value because they will remain uselsss (scam tokens)
Its not only about volatility, good product matters too