what do you use wallet or exchange for? Do you want to trade or hold ?
If you hold on a mid term or trade, you should use exchange. And hold your coin for security, you should use hardware wallet.
hi, I use multi-signature wallets for holding coins. Multi-signature wallets make it so that n-of-m keys must sign a transaction before moving funds. In its simplest form it is 2-of-3 keys. For Bitcoin and bitcoin variants (e.g. Litecoin), this is absolutely how I would recommend to store institutional funds.