Which addess is safer? Short or long?
Bitcoin address is safer whether they long or short in my opinion unless you don't give your private key to someone else. They might be long but those unique bitcoin addresses give you pseudonyms to other people.
But the case might hit differently to other addresses before ethereum there is altcoin that uses a simple address but I don't remember the name of coin, and Ethereum right now uses ENS or etherum Name services like domain so basically you can make your address shorter and give you flexibility to the address