As which coin i need to invest in it.
ETH and BNB are altcoins which in my opinion have very good potential lately, especially altcoin BNB really shows a significant increase, many investors are investing BNB and many traders are trading these coins.
I think that some good altcoins on which you can speculate and earn some money must be COSMOS (ATOM) which is doing very well and ERD which is an excellent growing project, a few weeks ago it touched the minimum on binance and now he made + 38% in last 7days. But yes btw ETH and BNB are also good!