Bitcoin is decentralized and if used that way there isn't anyway the government can traced back the transaction to you but the issue is that people make use of centralized services then they think the government won't be able to track them. We can't leave trace behind and expect Bitcoin to save us. The amount stolen is too much and will raise attention despite the currency the money was stolen in. When people thief this type of money, they don't stay low profile but begin to move the money almost immediately and this is why the government are always quicker to catch them because the transactions are being monitored. There are people that're stealing more than this but still haven't been caught because they're careful. You can't be committing a crime and still being careless.