how you guys keep your crypto when do trading?
leave it in exchange wallet? Isn't it too risky?
Store in a hot or cold personal wallet? isn't it too annoying to transmit every time?
leave it in exchange wallet?- Some of the traders doing this things if the exchange has a good reputation or belongs into top 20 exchangers.
Isn't it too risky?- Its risky almost all exchange platform actually. But you can google authenticator/2fa to prevent hackers.
Store in a hot or cold personal wallet? - it is much better to store in cold wallet like Electrum
isn't it too annoying to transmit every time?- Yes it is!