Both Terra (LUNA) and Solana (SOL) are good crypto assets to invest in right now in my opinion, as they both recorded thousands of percentage gains last year and in another bull cycle, both could rally again.
However, if you want to maximize your profits by taking advantage of one of them, then I think Terra (Luna) is a better investment than Solana and always make sure you do your own research, and only invest what you can afford to lose.