A bitcoiner is someone who

- measures his whole wealth in BTC

- war against fiat and KYC

- promotes self-custofy

- permanently studies it in an holistic manner (libertarian)

- rebel against the system

- supports open source / freedom tech

- think about it at least 6 times a day.

It's basically an activist that promotes Bitcoin as a movement, rather than just an investment or tech.

His BTC bags would probably be used to protect and make Bitcoin unstoppable.

We are probably a couple of thousands in the whole world.

The alternative is just being a regular BTC investor. Most people will fall in this category.