"The other side thinks blockchain is practically useless, the most overhyped technology ever created, a bubble never-before seen in history."

I really think the bubble side of crypto currencies is wildly overstated, the total market cap is tiny in comparison to any massively over leveraged asset (housing,student loans) etc.

Whilst BTC and others may be in a bubble even if they crashed to zero now it would pale compared to bubbles within the last 20 years.