Satoshis. A fractional Bitcoin. Of course the answer is that nobody would use Twitter if that were the case because nobody cares about crypto currencies except for either speculation or fraud.
In my country most people (even Govt officials) speculate on the US dollars against our currency, there's lots of fraud with cash, or social engineering old people to steal their money from their home banking. We should get rid of all of those as well, right?
2. Bitcoin != "cryprocurrencies" - which is why I didn't include Elon Musk under 1.