I totally agree that at least they had to share any proper reason for blocking my account, but they keep telling me that I have to remain patient.
No, they absolutely do not. You have around $7-8 million dollars on their platform at the time your account was locked for suspicious fraudulent activity. They have stated an external investigation is ongoing - i.e. law enforcement. This means they are bound by law to co-operate with the investigation and keep your account frozen until it is complete. They are also bound by law not to disclose any details of the investigations, and since the investigation is not being carried out by them but by law enforcement agencies, they have absolutely zero control over how long it will take.
If you didn't want to be investigated by law enforcement, then you shouldn't have engaged in suspicious activities. Now that they are investigating you, it's definitely in your best interest to stop spamming details of the case all over the internet. You would be wise to lock this thread.