Hello NB. To answer your questions, you have absolutely nothing to worry about. IBKR is definitely not a bucket shop; it is a publicly-traded, heavily regulated giant, so they route your trades directly to the exchanges and won't terminate you for being profitable. A $10,000 account is a very standard size for them, and withdrawals of this amount are processed smoothly, usually within 1–2 business days. The QR code prompt and the mobile app (IB Key) are just their standard 2FA security layers to ensure it's actually you withdrawing the funds. I’ve been using it for years, never had any security issues, and it feels highly secure. The platform can feel a bit overly corporate and annoying with its verification steps at first, but your funds are safe here.