Not how it works. You can trade any fraction of a coin with or without an exchange. Exchanges facilitate trading, but they aren't required. And btc hasn't be

Not how it works. You can trade any fraction of a coin with or without an exchange. Exchanges facilitate trading, but they aren't required. And btc hasn't been 20k for over a year -- in fact it never got there as I recall. It's been trading around 3k for the last few months.