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.
You mean blockchain based cryptocurrencies are to be used for store of value purposes ? Blockchain is basically a distributed common ledger. It is a new innovative way of maintaining database without lagging in any security measurements hence misusing it is highly impossible.
Let me come to the point of your discussion. You mean that any investor must choose a coin based on store of value and should not bother about the current volatile nature of markets ? I guess store of value or basic value of a coin is being derived from demand and supply ratio and not just due to intrinsic value. So, you need to do a depth analysis and research to find the right coin to invest.