sure this is LTC, BTC and ethereum and not the other coins
With a long-term investment plan from 5 years to -10 years, Bitcoin and Ethereum are the 2 best options, one is the king of crypto, the other is the king of altcoins. But LTC is not a good idea, LTC is one of the oldest coins and in general it is not upgraded and updated often. it is quite old and outdated compared to the recent emerging altcoins. if it were me, I would choose BNB over LTC.
And I also have several Bnb instead of Ltc. because in addition to being supported by the best exchanges [ Binance , it seems that many are interested in this coin. everything can be seen from the ups and downs of the market graph on this coin