Your local exchange, if there's any. However, with that amount involved, you must accept that you can't just easily withdraw it. You also need to comply with KYC and be contented on your account limits but I will assume higher tiers at most of the cases, should be able to cover your desired daily limit.

You will need several days to cashout all if ever the amount involved is really huge. Anyways be ready for the possible interview so I suggest to just withdraw small amount per batches.

Another one is via P2P. Although there's a low chance that you can find someone directly to trade that kind of amount, at least you will be able to avoid KYC on some exchanges if you aren't comfortable with it. But this method is way riskier; either via midman/escrow or via meetup.