usually new token has already laid out their road map and will just follow that path, with old coin that are already dying with their trading volume dwindling as the time goes it might pose higher risk of making you lose your money because of delisting, with new coin that are supported and backed by tier 1 investors out there, the only way is to go up.
thats why its heavily advised if at least someone wanna invest in coin that are old, they should observe carefully whether the coin is losing traction, losing community and volumes also whether the coin itself is gonna be delisted because its really important to know since old coin that got delisted are usually done for, not gonna make come back again will succumb into zero.
meanwhile old coin that are good enough, always have innovation and having high trading volume might have chance of rising again like ethereum.