The cryptocurrency industry started with the launch of Bitcoin in 2009 and then flourished in the following years with various assets and blockchain-based solutions. According to Stephen Stonberg, CEO of Bittrex Global, this is no longer in its infancy.
If you consider the years since bitcoin was launched then I might agree that we are not in early days of bitcoin hence anyone who adopts bitcoin today may not be appropriate to call as early adopter but if you consider bitcoin's price levels to refer for early or late adoption then I may not agree with that.