We always saw many stable coins are we going to buy but for now must better to choose etherium if you have extra money or bitcoin to buy on it because we know so many traders for now buying etherium because this will be going in huge in the market.
My opinion in choosing a altcoin is important before investing think a lot of times after investing dont give up in todays situation ethereum is the best coins for better profits.
I would go for ETH, too. It has an important role in the crypto space and in my opinion there is huge potential. I don't know if there will be a flippening, but if there will be one, ETH could get first place. It will be very interesting to see, how PoS is affecting the performance of ETH.