I do not think that today's crypto currencies will lose anything, I mean that the crypto-currencies will die. I think that the Crypto-currencies will be developing very well and in the near future I think that they will be able to replace the fiat money.
Well don't think anything negative because crypto will never ends unless internet and electricity on this world will disappear or this world will be destroy? Then if not the crypto will continue to live forever and will grow more and more everyday.