Its confusing to use decimal places, we should use satoshi instead to be prepared for deflation the coming years.

0.0000 0001 BTC = 1 satoshi

Btc@100$
1$ = 1M satoshi

Btc@1000$
1$ = 100K satoshi

Btc@10,000$
1$= 10K satoshi

Btc@100,000$
1$= 1K satoshi