For me there are two best altcoin candidates right now, the first is Ethereum and the second is BNB, you can choose one of them to use as an investment both in the short and long term, while the other altcoin you can invest too but it is more suitable for me to invest in the short term
Yes, but it is also suitable to be invested in both, because they are equally good to invest in the long term, and for other options, I can suggest to LTC, XVS and TRX, it is also suitable for long term investment