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.
but that is also the problem to how finding a less popular project but has a potential for growth in the net coming years , or what I say in the next halving that will come in April next year , so lets all accept to be ready and prepared .
or else failing will be in our part because of not choosing the correct coin.
Ethereum is one of my most favorite and of course the next higher coin in my folio next to bitcoin.
Regardless of the market trend, i personally only operate with a few altcoins, the main ones in which i invest are eth, bnb, matic and cardano
be aware of potential loss in Binance coin , they are facing some bad problem in the soonest time.
be ready to what happened in XRP and now for BNB .