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.
It's not blockchain but crypto, crypto is indeed can be considered as store of value if you are seeing bitcoin and so many people have been putting their investment on bitcoin to store their value. blockchain is a system and you should know the differences.