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?
of course, you should be considering a secured wallet because you are having a huge amount of bitcoin . if you are looking for highly secured wallet then web wallets can't be recommended for you, maybe you should install a hard wallet to your pc and make sure you won't be attacked by a botnet or any malware . I guess installing a hard wallet on Linux OS especially Tails OS is the best .
Looking at the rate you are acquiring your bitcoins it would be the right time to consider a hard wallet like multibit or a secure web wallet like blockchain.info and just remember to keep your mnemonic safe should you ever run into problems with your wallet.