As I see BTC as a currency, this makes no sense. Would anyone talk of the US $ as a career?
You can have a career in blockchain technologies, or in services around BTC, but not in BTC by itself.
That is true, not an great idea to choose bitcoin as a career, it is better that we concentrate on our jobs and let bitcoin just be an part time income, it is good to hold good amount of coins in your digital wallet for the future, but making it as a career doesn't sounds great, you cannot invest your time in any currency to make it as your carreer, invest your skills and time in something where you are expert.
What I mean is not bitcoin as currency, but bitcoin-related business, like trading exchange platform, wallet services provider etc.