If anyone is truly bewildered by the massive drop in Cryptocurrencies over the last year then they clearly can't be familiar with trading in general. Anything in any market (stocks etc), that soars up in price in the fashion that these cryptocurrencies did, eventually need to face a correction (in this case 80%+). It is healthy for the market actually, it could never withstand the pace that it was going at.
I agree but majority didn't see it that way. They though that the price will still go on parabolic rise even though all signs points that we have bubbled already. Lots of irrational investors, mostly newbies got burned easily and I think most of them go bankrupt and went out last May-June time frame. And by the way, I don't think supplier will be the appropriate term here, though.