Of course investing in old coins is more reliable than new ones. Because new coins don't gain much trust of people in the market and people always hesitate to invest in new coins but people never hesitate to invest in old coins. Like from my side if I say I always focus on Bitcoin, Ethereum, Solana and BNB etc coins to invest I never invest in unique coins except in these coins but may be involved in trading in new coins for short period of time. I engage in trading with new coins but short term and most top exchange list I engage in trading with all those coins.
This year is the halving period. Of course, everyone is doing it with full calculations. Remember the opportunity for it to happen again. You need to wait quite a long time. It's natural, as you said, that investing in old coins is more reliable than new coins.
But actually, it's not just about old coins, but you have to see whether they have potential or not which can provide profits in time. Many old coins which are not potential are not much different from new coins, so always analyze them well before making the right decision.
Bitcoin, Ethereum, BNB, SOL are currently highly sought after and targeted for investment because they are very convincing, although it does not rule out the possibility that other altcoins also exist as long as you want to analyze them first.