Re: Bitcoin is wasting electricity and are harmful to the environment.. Yea right!!!
Feel free to add some updated statistics and also a graphical presentation of what those millions of cards would look like, if you had them all together. We would circle the earth a couple of times, if we had all the cards that were manufactured, since it was introduced many years ago. 
Hilariously i have 3 or 4 VISA/MC (still "valid") that could in theory not spend more than 1 satoshi (one is "Gold" lol), and now my entire country has to toss them, because Trump ordered American companies to leave so by the end of 2019 both companies will cease to operate here.
This obsolete method of payment should just go away. We are heavily dependent on debit cards, also operated by both American companies. Who knows what they will do at the end of the year, my guess is that they will bring the only non American debit/credit card company, Chinese UnionPay.
There is little and not enough banknotes, and they are too small to buy things anyway. Hyperinflation renders them useless in mere months. So you can add to the pollution the actual printing of bank notes.