Do you find some mathematical activities useless?

[Maximilian Hohmann]

(03-31-2018 10:29 AM)pier4r Wrote:  What is your view on those topics?
a) Useful
b) Useless

b)

My background is engineering (now operating the things I once helped to develop). We are paid to get things done in (almost) real time. No time to play around with our tools, in this case mathematics, just use them. And use the best tools available for the job.
And regarding cryptocurrencies: I regard them as one of the most insanely useless things that humanity ever came up with. Mind you, the computers running 24/7 worldwide employed in "mining" Bitcoins consume as much electricity as an average Europen country. There should be laws against that kind of madness and better sooner than later.