I have read dozens of threads saying you need to keep your BTC on a hardware wallet or paper. Anything online isn't safe they say. When trading that is not really feasible is it? I like to move in and out of positions several times a day and often at a moments notice. My trading account has a sizable balance (to me - 5 figures) in it.
How risky is this and any additional things I could do?
I suggest you make 2FA security on each account that has a lot of BTC, minimize the crimes that occur in the online world, if it installed 2FA I think it is safe.
It is a good thing to have a code as a good expale of security that could level and heighten up the security of your wallets. But it is also a good option for people ti have multiple account of wallet depending on its usage, for expale if for holdings daily transactions, and concreting so you could limit and save at the same time.