Who marks the markers?
"it's" (its)
Are you sure about that one?
Its is not the same as it's.
Grammar lesson:
It's is short for it is or it has.
Its is the possessive form of it.
Yes, I know, but Isn't 'It's a C-' fine? It is a C-?
Yep, that's fine, I should've included context:
"bitcoin is it's own economy" (first page of actual report)
Also, while I was checking the context, I spotted:
"I didn’t realise [that] we live[d?] in a dictatorship!"