I'd argue instead that the main use case is to buy a cup of coffee with Bitcoin anywhere in the world without having to deal with fees and red tape.
So using your analogy of evolution, transaction scaling is probably going to be the biggest driver of who gets to be at the top of the crypto food chain.
If you want to actually hedge against inflation then TIPS or stock indexes are usually better choices for most investors.
Also, I don't fancy trusting my money to a small group of Chinese miners, who seem in practice to control the network.
BTC is quite different as it is only a "value store" and is inflationary (the supply of BTC is fixed and won't increase)
My personal suspision is at some point the miners will convince everyone to make a fork which keeps miner's fees forever.