Another question is, what can we call the study of Bitcoin? 
I don't think there is a specific word that denotes this, but bitcoiner also sounds correct here, no?No! It doesn't. I was thinking "Bitcoinology or Bitcoining" goes well, lol, but it doesn't make sense at all. Like you already said, there is no specific word for it as of now but am thinking of deriving a word for it.
Bitcoiner is more suitable, you can find it in many unofficial dictionaries. I always mention someone who interested with Bitcoin are Bitcoiner or Bitcoin enthusiast, I never mention "Bitcoinist", it just sound not right and strange.
1. https://en.wiktionary.org/wiki/bitcoiner
2. https://www.urbandictionary.com/define.php?term=Bitcoiner
3. https://crypto.ro/en/dictionary/bitcoiner/
Discussing about this, it makes me remember with this user CryptopreneurBrainboss, so another alternative could be Bitcoinpreneur.
1. https://en.wiktionary.org/wiki/bitcoiner
2. https://www.urbandictionary.com/define.php?term=Bitcoiner
3. https://crypto.ro/en/dictionary/bitcoiner/
Discussing about this, it makes me remember with this user CryptopreneurBrainboss, so another alternative could be Bitcoinpreneur.
It sounds not right to you because you have not been using it and your brain have only gotten used to one word which is Bitcoiner.
Those other two names you mentioned are cool and doesn't sound strange. If you add the suffix "preneur" to a nouns, whether the word is in the dictionary or not, it will still make sense and add a different meaning to the nouns word and make it cool and easy to understand the topic of discussion. For example, bluntzy-preneur will make you think that I have the mindset or spirit of an entrepreneur.
