What happens when you transfer over $10000?

Excuse me, I'm a bit curious about the process of transferring large amounts of money, specifically over $10,000. Could you please explain what happens when I initiate such a transaction? I'm assuming there are certain procedures and regulations involved, especially when dealing with cryptocurrencies. Could there be any delays or additional fees? And, importantly, how secure is this process? I want to make sure my funds are transferred safely and efficiently.