Why does mining / validation of recent blocks must be difficult / time consuming ?
Why it could’t be so simple as simply discover a hash for a textual content?
Is it simply to regulate / restrict the quantity of recent crypto volumes coming in ? If so, is not it an vitality consumption concern ? Aren’t there every other options ?

Sorry for asking too many questions. I’m only a bit confused.

Adrian is a brand new contributor to this website. Take care in asking for clarification, commenting, and answering.
Try our Code of Conduct.