
When he posted that in November 2017, it was basically peak delusion time.Everyone involved in cryptocurrency believed bitcoin was the 2nd coming of christ, that the government's of the world would adopt it, it would be widely used as a currency, would take over gold etc.
What happened was everyone and their mother tried to buy some, the network slowed to a crawl , with transactions taking days at some points, and the price of these transactions were ludicrous to get the miners to process them, upwards of 1kusd at times.Companies like Microsoft, Steam etc saw this and dropped it as a payment option, and basically everyone else followed.The market then crashed in Jan 2018, half the altcoin founders ran with the money and deserted their projects.
Over the next 2 years pretty much every government of the world called bitcoin out, many outright banned it.It soon became near impossible to cash out without paying hefty taxes.It was clear nobody was adopting it, and it had failed as a usable currency.So the store of Value meme was jumped on by the Twitter/reddit crowd, "digital gold".This however is collapsing right in front of our eyes.