Retail investors can now buy the Ethereum Classic Investment Trust which means Ethereum Classic (ETC) can now be bought as an ETN (ticker ETCG), similar to way you can buy bitcoin thru GBTC. It looks like premium is 30-40% over current price of Ethereum Classic. This and GBTC are the only two publicly traded vehicles in cryptocurrency like this. Year from now who knows, how many cryptocurrencies will be available on OTC marketplace (OTCQX).