l would like to draw your attention to the fact that BTC is the best for longterm investing. You can also choose ETH. Because ETH has potential than another cryptocurrency. You can listen to the view of another investor, but you must decide after the resourcing. l think it is a tremendasly way to invest. Good luck!
As what I am seeing in the market now, it's good to invest in coins that has a high volume, ETH is included, it's part of the high potential coin in the market but it's also nice to invest more than one altcoins. Bitcoin does not start at a high price, altcoins has a future, thus investing with them could also give us a good future if they will be develop.
Investors are just watching, traders are the one actually who can make a coin grow, when they believe on it, they will trade on it and when more traders are trading the coins, it will become popular and it will own a liquidity which is the key to increase increase once big progress is announce.