Qtum is the better version of ETH and can use every update ETH makes and process it into Qtum itself. This means that it makes more sense to HoDL Qtum than to HodL ETH. Realisticallly Qtum could se a 5 billion marketcap within 2 years, that would mean that Qtum would rise from 2.50 to 50 usd. It sounds like madness but Qtum can do it.
Comment:
the sky is the limit :)