Wow. The European central bank doesn't want bitcoin. Now that's some news. Buy signal!
The link doesn't load from Tor. Apparently, they neither want Internet privacy.
Bitcoin is rarely used for legal transactions
That absolutely tells me nothing. It's a neutral currency. By the same reasoning, the euro is rarely used legally as well, and so, it's in its last stand. It is well known that there were black markets before 2009. Laws don't tell much about the currency either. In China, North Korea, and wherever else there's communism, as far as I'm concerned, it's illegal to use Bitcoin. Not to buy drugs and guns. Just to use it. In that case,
any transaction involving bitcoins is illegal.
True, whether Bitcoin transaction is illegal or legal depends on the existing law in a country. Pretty much those that make Bitcoin illegal can say any transaction made in Bitcoin is illegal.
The author simple generalization of Bitcoin usage is mediocre. He jump in a conclusion without doing any research of his own topic. If he could have known how to type and search legal company that accept Bitcoin, he would be ashamed of what he just stated.
One major proof to refute the claim of the author about Bitcoin never been used for legal-transaction is the number of company that accept Bitcoin. Some of them are already listed on this article:
https://99bitcoins.com/bitcoin/who-accepts/ and many more unmentioned company and retail stores that accept BTC.
most companies that accept bitcoin do that just to be "cool". they convert the payment to real money straight away .
you can argue as much as you want , but paying with bitcoin is truly inconvenient .
cash is also inconvenient .
i prefer paying with my smartphone or a watch , this is the "new" way.
How many watch or smartphone can you bring? If you think you an pay with your smartphone or a watch in every purchase you do, I think it is encumbersome, and the problem would be how would the seller give you change after you pay with your gadget?
Kidding aside, You can transact with Bitcoin via smartphone, it is pretty convenient with the use of LN since there are already an apps that integrate LN for fast payment. Ever heard of the Pouch wallet project on Boracay Island making it a Bitcoin Island where retail store can accept Bitcoin via LN transaction through their apps. Here is the thread[1] if you haven't known it yet.
[1]
https://bitcointalk.org/index.php?topic=5419576.0