Why would they flag me if I open a bunch of accounts with different IPs using a VPN? How would they know I'm using a VPN?

The IP addresses of VPN servers aren't difficult to recognize — there are even databases that try to determine whether an IP belongs to a particular provider. When you access a website with a VPN on, it may be able to identify that you're using a VPN using your IP. However, this doesn't mean the website will know the identity of the person behind the IP address — just that they are using a VPN.

tried binance again and got 1500$ of dai. Just a small amount to try out.
Now how to do the other 800k?
Repeat this with new different accounts on binance with different iPs through VPN? What amounts i should be able to do without kyc or any risk on any problem?

It seems that you just found out about the little pot of gold that you hold and you may see a bit "lost" in what should you be doing and how to deal with this news.

First of all congratulations. 20 BTC, at it's current price, can chance the life of everyone and you should not let this excitement translate into fear / stress.

how to sell anonymously for cash? Most exchanges will ask for some sort of ID since the government demands it (at least I know that Kraken and Binance do this), at least for high amounts of trading. May I ask the need to sell anonymously? Do you have some sort of fear that people may found out who you are or something like that?
how to exchange for stablecoins anonymously and safe?Stablecoins, from the limited knowledge that I have, may be frozen with no notice. Please think twice before going this path.
how to store stablecoins? - See previous answer

Whatever you do don't go all in with the 20 BTC. My suggestion would be to pick an exchange, try to exchange a small amount of BTC and see how it goes.

Whatever you do, just take it easy. If you have BTC in a cold storage no one can take them from you, assuming you don't fall for those scams that try to trick you.

I hold over 20 btc in cold storage and like to sell some at these prices.
how to sell anonymously for cash?
how to exchange for stablecoins anonymously and safe?
how to store stablecoins?

<…> binance locked my account within 1 trade...

need 20 btc converted to a usd stablecoin, need trustworthy escrow (or open to any other suggestions) and will do multiple smaller amounts.
marketprice

how to sell anonymously for cash?

how to store stablecoins?

Well, Binance isn't anonymous nor is it fully KYC-free, at sums as large as almost 800,000$, I am quite sure they will request identity verification to proceed with the withdrawal.

OP, your best bet is Bisq if you really want anonymity and privacy. Exchanges keep your IP and fingerprint besides deposit/withdrawal addresses. It might take a while as liquidity isn't Bisq's best feature, but privacy always has a cost.

If the exchange has a KYC program already in place that means they can force anyone at any time to comply with it and block their accounts with their funds until they submit their documents. It is not wise to use centralized exchanges if you are looking for privacy and don't like to give up your documents to strangers!

I would also advise against using stablecoins for storage under any circumstances. They are highly risky even if it doesn't look like it because they are all centralized altcoins.

Hodlhodl or bsiq exchange will be good to sell Bitcoin anonymously, you can also use ithis exchanges to buy Bitcoin without no kyc.

That is the part that confuses me, in essence if investor profits drop by an estimated 33% then it should have investors concerned but devans thinks he has the correct formula to take Bustabit/Bustadice further and to be honest it is hard to argue with him because of his excellent track record. How do investors reconcile perfectly held belief and trust in devans along with a drop in profits by 33% - that is something difficult to accept.

(...)

I think keeping the equilibrium aside several investors are a little upset they were not advised beforehand or maybe even consulted before the changes were made. I know you made a post explaining your reasons so I hope they would be satisfied with the explanation.

Is it really necessary to say that 5000+ BTC and 6500 BTC are significantly larger bankrolls than they need to be? Another way of looking at it is the size of bankrolls are advantages and are attractive to investors in that others would want to invest as it shows the website and its owner are genuine/trustworthy etc. Maybe a change in format should have been implemented after consulting investors so that would have eased the transition better.

Giving an advance notice is something I considered, but ultimately decided against because it would have made virtually no difference to existing investors. Had I announced the change a few months ago your only options would have been to remain invested or divest, the same options you have now.