Ethereum is a strong currency and has a good team, but in investing, the larger your market capacity, the more limited the chance for the price to double. Investments of one billion dollars may not move the price, while investing such money in some altcoins may lead the price to explode.
If you want long-term trading, Bitcoin and Ethereum are a suitable choice, but for short-term trading, some altcoins have the opportunity to rise faster.
I like this your reply/suggestion. Investing in Ethereum is very good, reason because they have a strong team but you shouldn't expect a huge profit soon when invest in them because the coin has already been there and it may not skyrocket just like and same thing to Bitcoin it will first fluctuate before it explode and people who invest in Ethereum, Bitcoin don't expect their profit soon, it is seen to be a long term investment though it can be short term depending on the behavior of coin but other upcoming coins can skyrocket so easily depending on the team and their target.