Solely for Ethereum ?aren't you planning in adding other coins ? it is good that you will trust Ethereum because it is one of the safest currency but we also Knew that there is another word about "never Put all Eggs in one basket"
Next bullrun is near to come , so be ready buying every coins that you believe will set you to become another rich person from crypto market.
As you mention, never put all your eggs in one basket and you will have a greater profit when investing in less popular (or smaller altcoins). On the other hand, investing in ETH is a much safer bet so it all depends on how much risk you want to take.
Absolutely , there are thousands of cryptocurrencies in existence and there are Hundreds in TOP rank that we can choose so why need to invest in single coin , also there is Bitcoin that is more safer and better so make it as our priority.
I may want to advise buying Ethereum also because that is what major altcoin means to me , and of course Binance though some news it was risky but for long term , I think I am good in this one.