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.
yes, now this is the most secure way to protect data. But if a hacker decides to crack your wallet, then you do not save your coins. So do not talk about your income. Money loves silence
if you can secretly deal with your investment better not to broadcast your earnings since hackers will really loves to try breaking your wallets
and they will try harder just to get in, 2fa is additional security only but its still us who needs to be more extra careful.