# If you trader never trade with one exchange use 3 to 4 exchange and divide btc with 3 or 4 parts
It's worth noting that in the past year or two, some exchanges have started flagging transactions when they suspect there's a connection between multiple exchanges
[the tricky part is to identify & ignore them before it's too late].
#Never accept any SMS Based 2FA it will be swap your sim ( SIM SWAP ATTACK) so avoid any 2FA code by sms
You have a point, but I'd also put email-based 2FAs in the same category
[both of them give users a false sense of security (unfortunately)]!