To trade, for privacy, you will best use decentralized exchanges like https://localcryptos.com/, https://hodlhodl.com/, https://bisq.network/ or any other decentralized exchanges.

For convenience, you can use the so called centralized wallet if it support swapping or conversion, or use centralized exchanges, but you have not full control of centralized wallets and exchanges, the coins on it can be hacked and no privacy.

About Bundle wallet, according to what I saw on Playstore:


I downloaded the app, it request for phone number and I decided not to proceed because it is already obvious that the app is not noncustododial wallet and it is just a payment app.

Best wallets
Full client

Full node wallets, Bitcoin Core, not for newbies and require learning very well about the full node, requires up to 5 to 10 gigabyte monthly to say updated and require almost 400 gigabyte to run full node. Only for those that want to have their own node bit most people use SPV light client wallets which are the ones I will list below.

Best light clients
Electrum, but an online wallet
Open source hardware wallet
You can also go for airgapped wallet which are also cold storage: Electrum cold storage