Thank you all. The picture is very clear now.
My favourite is still Kraken, but looks like I miss Kucoin. I'm gonna correct it fast.
For moving out, yes I use USDT.
I do not care about network speed. My problem is withdrawing itself. No body like withdraw and made my life more difficult to slow me down.
I've never moved more than $10K in one transaction, old habit. If somebody use to please share.