How is this still going? Check the link below and discover the infinite magic of decimals.
https://en.wikipedia.org/wiki/Decimal_markYou will see that
1BTC is infinitely divisible and more than enough to replace all the worlds currencies. If you are still unclear then consider whether 1.00000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000
0000000000000000000000000000000000000000000000000000000000000000000000000000000
1 is a big enough number.
If not, I can add more zeros. As many as you like.