Wallet Id's

[Messinapete]

Hello,
Probably a very simple answer to my question I have a 'Coinbase' wallet Id and usually buy only from 'Coinbase'
IF I want to buy/sell with another company (at times) they automatically generate a different 'Wallet ID'

Does this mean I have to remember numerous 'Wallet Id's?

Finally, Can I change my 'Username'
Many thanks

[MintDice]

No, you do not need to remember numerous wallet IDs. You can repeatedly use one, you can use multiple, you can use new ones each time, it all works. Using just one wallet is good if you want something easy to remember. Using only new wallets is good if you would like better financial privacy. Good luck!