In my opinion, Ethereum is best for long term investment. Ethereum has a solid foundation, it has advanced blockchain technology, many ICOs use the ERC20 platform. Besides, Ethereum is a huge capitalization, it is just after Bitcoin, every day Ethereum has a huge trading volume. I believe in the future Ethereum will bring a lot of profit to long-term investors. In addition, we can buy some other altcoin such as Cardano, Litecoin, IOTA, NEO or Monero.
Actually, I have same opinion. But, how much money must be invested because we know that ETH price is high enough. How do you think about buy some cheaper altcoin which is the price below 1k satoshi. Maybe the price will up for long term. I'm still confused what coin will be up or dead. Need direction for this one.