>why there is no Ottoman Empire? 

Great observation

>Why 2028 for Bitcoin

I think is next Halving.

Rsync25

That's right, they mostly used gold and silver, plus, I think they have pulled the Bitcoin thing out of their sleeve hahaha.

riberet19

strange - why there is no Ottoman Empire? and why 2028 for Bitcoin 🤔

also using the mix of empire/country names and currency instead of currencies in each periods seems quite inaccurate, as most of them probably used gold.

bitcoin

World reserve currency periods

strange - why there is no Ottoman Empire? and why 2028 for Bitcoin 🤔

also using the mix of empire/country names and currency instead of currencies in each periods seems quite inaccurate, as most of them probably used gold.