I'm keeping some on bread wallet and copay on my iPhone. Going to get a trezor. Anyone have experience with these wallets? My exchange is Coinbase but everyone is saying don't leave it there. Question- when you remove your coin from the exchange into say bread wallet, does your private keys come too? Still learning about this. So I copy an address in "receive " in my wallet and paste it in Coinbase 'send'. Then I receive bitc. Is that my private key or if not, how do I get it? Thanks.