"It's clear that Tether was the kickstarter to the mania by printing about 2 billion in 2017 on a total market of 1 - 10 billion in the last 10 years."
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3195066
According to
https://www.coinfairvalue.com you can clearly see from BTC's chart that the run up in late 2017 was FAKE! It was an increase in price but the fair value didn't move.