Misspellings can be either one of two things:
This post is an effort to tidy up possible misunderstandings. Blockchain or block chain? Read on.
"Since Bitcoin is both a currency and a protocol, capitalization can be confusing. Accepted practice is to use Bitcoin (singular with an upper case letter B) to label the protocol, software, and community, and bitcoins (with a lower case b) to label units of the currency."
Source:
From the Ethereum whitepaper by Gavin Wood.
"What Ethereum intends to provide is a blockchain with a built-in fully fledged Turing-complete programming language that..."
Pretty clear he is talking about the network.
"The account's current ether balance"
Pretty clear he is talking about account balances and hence "coins".
Source:
Typically words follow the rule for capitalisation: first letter should in a name or if the word appears at the start of a sentence.
While the Bitcoin whitepaper doesn't mention the term "blockchain" it does, of course, provide an understanding of what a blockchain is:
"to make it satisfy the proof-of-work As later blocks are chained after it".
What isn't so clear is the spelling. Wikipedia suggests that the first usage was "block chain" but commonly accepted usage is now "blockchain".
Sources:
The following spelling are hard to read:
