Your “refutation” is leaving out some key details:
1. You do in fact have to deal with legal requirements - it’s a requirement for converting into useful money and tax evasion has serious consequences in most of the world.
2. Replacing Western Union has some appeals but it’s not enough to justify the returns which blockchain salespeople have been claiming, especially when the established player can cut margins easily and blockchain users need a fairly large just to compensate for currency conversion and increased risk.
The Ponzi claims aren’t because someone is claiming that they can beat PayPal’s overhead by 2% — it’s from all of the people claiming double or triple digit returns which are obviously unsustainable, and hand waving questions away claiming that you should just buy now before the price goes up.
> And when you own stock, you cannot do much except hodl and sell
My dividend income suggests you might be leaving something out here too.