Also, do you primarily use the word Bitcoin, or do you use some translated form of that word.
We say Биткоин and sometimes Битмонета. But we all understand
the word Bitcoin. So I think that the word Bitcoin is the best option.
Would you feel that настоящий is the best word to use in this context?
In what context? It also depends on the form of the noun. So if you'll
биткоин' - it's correct. But in the plural form it should
' (yes, we have plural adjective forms). If you
wanna say '100 genuine bitcoins' it will be '100 настоящих
If you just want something like "it's genuine" on the hologram you may
print 'ПОДЛИННО' over and over again. Ask if you'll have any questions.