A person who is bullish on Bitcoin.
A Bitcoiner may be that friend you have who cannot stop talking about Bitcoin. Many Bitcoiners have been HODLing their Bitcoins since the early 2010s. Most likely, your Bitcoiner friend will be checking their phone to update you on the current price of Bitcoin, either growing wide-eyed about their newfound gains or crushed by the latest dip in slight panic that their life savings could be wiped away.
Despite the volatility of Bitcoin, a Bitcoiner believes in a future where Bitcoin continues to dominate the cryptocurrency market capitalization. Some idealistic Bitcoiners may even believe in the cryptocurrency’s power to revolutionize the global political and financial system.