I have less than 10 in localbitcoins and about 5 each on BTCC and their justpay wallet.
I don't trade actively, just buying around 1 coin every week or two since a few months ago.
Should I be considering some secured wallet?
No matter the amount you should get a secure wallet. If you have a substantial amount of coins, use a cold wallet (just google how to). Having a secure wallet should be number one on the list of agendas of anyone using Bitcoins. Don't store a lot of your coins on websites or wallets where the admins has access to your coins.