Had this mail from Degiro
We noticed that you have a substantial amount invested in one of the Money Market Funds. This is because unused money on your account is automatically invested into a Money Market Fund (MMF) via a standing order. Amounts in MMF holdings are not (fully) compensated for negative returns. The return for most of these MMF’s is negative at the moment.
This situation is most likely not ideal for you, and neither for DEGIRO. Your investments in MMF’s are costing you money through negative returns. Next to this DEGIRO is bound by certain regulations with regards to these MMF’s.
To resolve this, amounts above €5500 that are invested in the Morgan Stanley EUR MMF will soon be returned to your bank account. In case you are invested in the FundShare EUR MMF, amounts above €1500 will be returned. This return will be one-off, but we may do this again in the near future if we are required to. Of course, if you wish to prevent this return, you can invest your money in other products of your choice.
This is not great so you can't keep money in degiro while waiting for an oppurtunity