I have a limit of $100k per day on Polo, it needed a Skype interview etc with their compliance guy, I'm trying to up it atm but they're swamped and unresponsive recently.

I can take out any amount from Bitstamp, ie last withdrawal was > $1.1MM but they keep thinking up new hoops for me to jump through, latest was that I had to sign messages from the BTC addies that I've used for years to prove that they're mine, but with patience one can get 7 figure amounts out, cost $915 in BS fees though, usually takes 4 biz days to be in my bank account.

The main hurdle is finding a bank that will not freak out when regular large amounts come in from Bitstamp's Estonian bank which raises red flags for them and also when you open bank accounts, especially USD offshore ones, they ask you to estimate how much you're likely to be paying in each month, this is impossible to estimate due to crypto volatility without unnecessarily restricting yourself, so when I estimated $250k per month and paid in $500 to $750 as I'd just found a property that I really wanted and BTC was at an ATH that also freaked them out.

When you get to amounts like $100MM you are in the 0.1% and everything becomes possible then and a good wealth manager will make all the intros that you need so long as you can prove that your wealth was obtained legitimately, in fact they'll even do this for free if you play your cards right on the probability or unsaid understanding that you may choose to show your gratitude by giving them a bunch of your wealth to manage long term if you're sufficiently impressed by how they can open doors and get stuff done and their track record.