I feel such possibility is extremely low. Making banking institutions disappear is simply a part of the bitcoin's development.Should this happen most banks might change their technology and try using bitcoins.

I personally use Bitcoin simply because, for certain dealings, it is cheaper and compared to alternatives.

Why is hm giving cash to us spread lases?c

Never touched drugs in my existence. (Really if you wish to be specialized I have had pharmaceutical medicinal drugs). I'd never buy it with Bitcoin, fiat or anything. Drugs are very dangerous, even medicinal drugs are not quite beneficial to your health.