I read a book about SEO (search engine optimization) and one question have not answered from the book.
What impact do comments have on search engine ranking (lets say the Google algorithm)?
Does a blog post which has a lot of comments will be better ranked than a blog post with no or less comments?

I casually brought up the subject of crypto currencies, bitcoin etc… with my 70+ year old parents yesterday.

I simply said that “by the time your grandchildren are adults, there will probably be no banks - we will all be just trading our own crypto between each other, and paying for everything with virtual money”.

The first question they asked was - “So if there is no bank, where do we get our loans from, and who pays you interest on your savings?”