Ethereum no matter how big it looks has the biggest potential right now. The mining sector is moving back to bitcoin and going away from gpu mining with the drop of the prices, the small investors in crypto mining is seeing this as a reason to sell their cards and get out of the mining game, this can't continue forever and the price has to go up to make it worthwhile for the miners, also the ICO's are long gone, there isn't a new one people are investing currently which means there needs to be a price increase and a bull run to make it worth investing into ICO's again and when that happens the price will go up again to sustain constant buys from investors who send it to ICO's. Combine these two and you have yourself a x3 price increase in ETH easily and that is amazing for a big coin like eth.