BTSC is a bitcoin stock. ETH is a type of cryptocurrency. You can download an app called Coinbase and buy ETH "coins". I bought 13 coins when price was ~$140, (which I thought was a high price, and in the couple of weeks that I've owned it, it jumped to $350 per coin. I also bought some bitcoin (BTC) and LTC (litecoin). The stock has been very volatile, but my impression is the valuation in the actual coins is much better. I'm up 60% on my investment with the coins. Some have made much more in the stock vs coins, but it all depends on timing.