Ill address and counter all your points:
- As I already pointed out nothing is really being decentralized since it cant really be used as a currency, it doesn't matter how valuable it is if nobody accepts it. As of now its a glorified unregulated stock market.
- This causes just as many issues as it fixes if not more, unregulated international money flow naturally leads to companies being able to avoid taxes and huge money laundering operations.
- The places you can deposit and withdraw from this system are centralized and thus is pretty easy to track and corrupt 4, That makes scams easier, the fact that once you send money its impossible to retrieve it back. I would consider that a bad thing, it removes all buyer protections.
- The blockchain cant even store images, people were spending tens of thousands on links to images which arent even guaranteed to still be working. At that point since you're not really offering a service why shouldnt someone just download the jpg and make the print themselves since they have to do the second part anyway.
- Maybe a few shops ran exclusively by nerds but normal stores that normal people go to dont use crypto, you cant just pay with bitcoin or eth at a local grocery store