My only contact was back when Bitcoin was first minted, and I had a lot of spare CPU cycles available, so purely as an exercise I set up a machine to mine a couple of coins without ever concerning myself as to their "value". A few years later, I made a tidy killing on them. But that's not to say I consider crypto to be a good investment. Back then, coins didn't need so much time/energy to generate. If you are buying currency, remember that 1 coin always equals 1 coin (ie its only yardstick for value is itself) so there are good grounds to consider it "pretend" money. It can still spend, but don't make the mistake of calling it an investment.