Nothing is better. You need to know Do you want to hold for long term or short term. If it is short term, whatever you use. If it is long term, I think you should consider about your coins's security, you should use wallet, specially, hardware wallet.
Yes, I think so nothing is better, but in short term, follow you, I dont need to consider about my coins 's security? I think we should store coins in wallet, hackers can steal coins anytime.