Bitcoin is not a viable a longterm store of value, because it has no mechanism to stabilize its value. (Even if it were truly scarce -- which it isn't -- there are plenty of things that are just as scarce but totally worthless.)
Bitcoin's real value can only be determined by on-chain transaction volume. If nobody is doing business on-chain, there will be no demand for coins, meaning no liquidity in markets, and price will drop seeking liquidity. Which is why not raising block size is utterly stupid if you care anything about price with Lightning Network not released yet.
If Lightning Network is ever released and functions, it's technically just bundling the same on-chain transactions, so price would continue to increase with an increase in LN volume, just not with an increase in security from fees being bundled. Most people would probably argue Bitcoin has enough security already, and mining increasing to the point of infinity where the entire planet is covered by a bitcoin miner is probably not a good idea.