Bitcoin is the only coin that is not an altcoin. Every other coin aside from Bitcoin is an altcoin.
I am the type of person to limit my risk as low as possible in the crypto-currency space so if I wasn't going to take Bitcoin my next pick would have been ethereum but according to you that is also out of the question.
Well I will go for BNB because they have been doing well and they have actually withstood some difficult bear market and have to an extent proven themselves.