if there is not a middle class, than I must be poor, since I am definitely not rich.
Definition of rich, middle and poor really depends where you live, what is your country standard.
To be reach in Africa or USA is really not the same category.
But, some people consider not just material wealth, money but also family, happiness, health as important parts or requirements to be reach.
Think about this.
You are right, of course, but I was just talking about wealth in the means of having money. I have no problems paying my bills and I pretty much have everything I (really) need. So, I am definitely not poor.
I don't own a car(could afford that) or a house(would have to take a credit). Don't own jewels or anything similar. If I would lose my job and wouldn't find another in a 2 years period, I would really be fucked. So, I am definitely not rich.
I have Bitcoin, but unless they raise a lot, like 10,000 percent. That wouldn't really change much about my situation.