Quote from: cryptomaaan on Today at 01:39:25 PM

The amount of BTC I hold in the dashboard keeps flashing from "grey/zero" to "the amount I accualy hold". On the right side I have a red error message:

"{"error":"Historical data not found for BTC-EUR at DATE","status":404}"

It looks like they can't access the server from which they get bitcoin exchange rates historical data, the reason why the page keeps refreshing!
Did you try accessing your account from other browser to see if the problem persists?

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While sending it's a pain in the a.. to be quick enough inserting amount, adress and then click on send. Sometimes it takes me up to 10 minutes to get to click the button to send in the right second.

As a temporary work around, try stopping the browser from refreshing by clicking the Stop (x) button on the address bar. If this doesn't work, there are third party plug-ins you can use to disable web pages auto-refresh. Then you can fill in the forum then click send to broadcast your transaction.

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Is blockchain.com avoiding users cashing out their btc because of the current market situation?

They can not stop you from cashing out your btc as long as you have backed up your wallets seeds. You can recover them on other apps any time you want.