Let's do the math:

iPhone 8 (2017): $799

1 BTC in 2017: $3,000 (you could've bought 0.266 BTC)

iPhone X (2017): $999

1 BTC in 2017: $3,000 (you could've bought 0.333 BTC)

iPhone 11 (2019): $599

1 BTC in 2019: $7,000 (you could've bought 0.085 BTC)

iPhone 12 (2020): $599

1 BTC in 2020: $10,000 (you could've bought 0.06 BTC)

iPhone 13 (2021): $799

1 BTC in 2021: $40,000 (you could've bought 0.02 BTC)

and so on.......................

$BTC