Every year, about 2% more gold is mined and added to the global supply. That means your share of the total gold shrinks over time, even if you never sell.
Mathematically, this dilution follows an exponential curve. In ~36 years, your percentage of ownership in the world's gold supply is cut in half. So across a lifetime, your gold wealth is halved twice just by new mining supply entering circulation.
The profound idea here is that Bitcoin's supply growth trends to 0% with absolute certainty. That means the half-life is infinite.
Your share never gets diluted whether you live 70 years or 7,000.