To complement what @demotruk rightly says, I would like to invite you to consider reasons for keeping your Hive off an exchange and how much "hotness" might be interesting for you.
Keeping just the "posting key" hot allows you to post, vote, comment but no financial transactions. If you also let the active key "hot" then you become an investor, and you might be interested in "powering up" ("staking" in other blockchains) and then reading my last post to learn about the possibilities.