You tell your 18 year old son he should start saving for retirement. Even if he invests 5 dollars worth of Bitcoin a week he will be able to retire comfortably. “But dad Bitcoins price is 10 million a coin! “ you tell your son a single Bitcoin can be split into a quadrillion fractions. He smiles and buys 10$ worth of Bitcoin on Coinbase. You open up the doors to your mansion and get in your Lambo. You were one of the lucky ones who bought Bitcoin under 100,000.