Yeah. Every time I make a purchase there's a mental calculation I do in the back of my mind about what future value I'm throwing away by making a purchase today.

My working assumption when doing these calculations is a 20-20 rule: Bitcoin flips gold's market cap (x20) a generation from now (20 yrs). So if I buy a bar of chocolate for £1 today, that's £20 I'm throwing away 20 years from now.