No it wouldn't. Netflix provides entertainment. Bitcoin provides the ability for speculators to make money, however there are ways to do so that do not incur the same costs.

You could argue that energy spent on entertainment is a waste, but it's been done since the dawn of civilization (the wasting of energy for entertainment - dance, art, fireworks, etc. etc.). As far as I know there's no way to entertain yourself without spending any more marginal energy compared to alternatives.

Presumably you, the reader, are reading this, on a computer that uses energy. Such energy could be said to have been "wasted", since reading the text I'm typing now isn't inherently productive.