If you look at how many transactions are done on the bitcoin network or at the number of people who own bitcoin, you'll realize that the number is way lower than one would assume.
After a few years (e.g. 10), the adoption will be many times higher than it is currently.
Even though this is not an indicator for an extremely increasing price (what most are aiming for who hope to be an 'early adopter'), this means that the whole eco system around bitcoin is going to get bigger and bigger.
I can very well imagine a future with shops hosting their lightning node, accepting BTC naturally. Compared to such a future, we are at the very beginning (where a lot of people still havn't heard of BTC and only a minority does own some).
I think more so than early, we're in the middle stages now. Anyway, cryptocurrencies or Bitcoin to be exact has been present for a good decade now. Although I agree on the fact that there are still lost for this market and its assets to undergo in terms of developing, increasing in value, getting stable and all other factors that would help it grow. So, although in terms of time of existence, we are not in that "early" stages anymore, but in terms of raw potential, I guess we still are.