protect yourself at all cost, on this case your coins. just having one wallet is very risky as you can lose all of them at once. there's no harm in having a back up storage
I am also protecting my coins by dividing it into different wallets. And aside from that, you can also minimize use of online wallets because they are more prone to hack attacks. Store most of your coins to a few cold wallets and use only online wallets for bitcoins you will use or spend more often.
Are not confusing what wallet you send it ? because if you are using multiple wallet there are reasons why right ? coz i can't handle two or more bitcoin wallets even the bitcoin wallet i use is not safe but it doesn't mean that this will can hack soon by attackers or etc because this is easy to use where i can easily sell and buy bitcoin.