For me the best one is BNB now. It seems like it has the highest potential among other altcoins. BNB has come a long way in a very short period and reached an ATH at $342. But this is only the start I think. My expectation from it is really big in this year. We may see the price reaching even 1k dollars before the end of this year or a value between $500-600 in the worst case.