ATH is short for “All Time High”, and is defined as the highest value an investment has ever reached in its history.

Whenever a cryptocurrency price passes its ATH, things can get crazy. While many leading investors thought bitcoin would hit an ATH of $10,000 by the end of 2018, it actually rocketed past that hitting $20,089 on December 16, 2017. Time will tell if bitcoin can pass that and hit an even higher value.