Do you think I make a good choice this year or I should include BNB so that if one is delaying me in the market, I can try the other one to achieve what I want .
I think your choice to invest in Ethereum is absolutely right. BNB is also a good Altcoin, but for peace of mind to hold for a long time, it cannot be compared to Ethereum. BNB is just a coin of a centralized exchange, and the future of a centralized exchange is something very uncertain, subject to restriction or blockade by governments.
Ethereum's ecosystem is growing with many applications and almost every major platform comes from here. Large organizations also feel secure in storing their money on the Ethereum network rather than other networks. In my investment portfolio, in addition to Bitcoin, there is always Ethereum - a coin that represents the entire Altcoin market.