As I assumed OneCoin being on MAS' Investor Alert List doesn't necessary have any affect on its bank accounts:
"As you have rightly noted, OneCoin has been placed on MAS’ Investor Alert List (IAL). The IAL is a non-exhaustive list of unregulated persons who, based on information received by MAS, may have been wrongly perceived as being licensed or authorised by MAS. Such persons include those who are conducting regulated activities without authorisation, or persons who do not conduct regulated financial services, but have been mistaken by the public to be regulated by MAS. The fact that a company is listed on the IAL does not necessarily mean that it has breached any of MAS’ regulations. However, investors should bear in mind that these persons have had a past record of being wrongly perceived by others as being licensed by the MAS and should exercise caution when dealing with them."
What comes to laundering money MAS is now monitoring that United Overseas Bank looks into the matter:
"MAS takes a serious view of the issues you have raised against United Overseas Bank (UOB). To prevent money laundering and counter the financing of terrorism, MAS requires financial institutions (FIs) to have in place appropriate customer due diligence policies and rigorous account opening procedures. While the detailed procedures for doing so are not prescribed by MAS, FIs are responsible for ensuring that their procedures are robust. Our approach is to first accord UOB an opportunity to look into the matter and provide you with an explanation. Hence, we have forwarded your feedback, including your contact details, to the bank for its review. MAS will monitor the bank’s response to you and follow up directly with the bank should there be any matters of supervisory concern."