There will be many things to sink your life force into going into the future besides btc. Everything has tradeoffs. But even if bitcoin doesn't eat every other store of wealth it will take some market share away from things like gold. This is not really that bullish but even that will make bitcoin's purchasing power insane compared to today.

One need not be a fatalist to believe bitcoin is going to continue to grow in value. IMO its a very rational view of the future.