When I was in English class, the teacher said that the first letter of a word is capitalized to indicate that this thing is unique. So I always think Bitcoin is correct.

Dollars or dollar as a common noun is always written with a lowercase letter, with the exception of starting a sentence (such as this one) or in a title/heading.

The US Dollar can be referred to as a proper noun (and capitalized) in some official documents.

As I was completing a survey about an hour ago, there was some mention about the distinction between Bitcoin spelt with capital B, and bitcoin with a lowercase b. Although I have heard about this before, and I usually pay a lot of attention to spelling and punctuation, I have to admit that I have totally forgotten about this.

When we talk about Bitcoin as a blockchain, payment method, or a service, we are supposed to spell the word with an uppercase B.

Here is an example:
My best friend doesn't see the advantages of Bitcoin.

When we talk about the currency or mention numbers and quantitates of the asset, the word should be spelt with a lowercase b.

Here is an example:
I sent my best friend 1 bitcoin as a birthday gift. 


Do you pay attention to this while you are posting on the forum?

Before I read this article, I didn't know that these differences still exist. The meaning of the difference between uppercase and lowercase is still very subtle. I learned in this article. I may pay attention to these in future reading, but what I am most concerned about is current wealth.

I actually do know the difference and still try to use it but let me tell you now that most people do not care and it is okay:)

For example, do you know whether it should be "the internet" or just "internet" or even "Internet"?

Most people don't care about putting a capital letter at the beginning of their sentences or finishing them with a full stop. But still, some might find it interesting to know the difference.

I think it's similar to Bitcoin. The capital letter refers to the technology. I would have to look up what a non-capitalized letter in 'internet' means though. Most people wont care about that either anyways  

I don't really understand whether writing B and b in bitcoin will refer to the difference in meaning between the two, because according to what I know capital letters are usually used when writing at the beginning of sentences and capital letters are also often used to write abbreviations or acronyms, such as when writing abbreviations from bitcoins (BTC).