The first surge towards 20k was at the end of 2017. It was down to about 4k in the first half of 2019 and up to about 10k in the second half of 2019. It went up and down between 30k and 60k in 2021. It's almost 30k now.
So 2019 was a good time to buy but maybe the mind share moment for bitcoin was 2017, when even TV news were talking about it every night.
